surse de curent si surse de tensiune - erasmus...
TRANSCRIPT
![Page 1: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/1.jpg)
Capitolul 3Surse de curent si surse de tensiune
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3.1. Surse de curent
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3.1. Surse de curent3.1.1. Introducere
IO VO
VO
I
IO
Parametri:• Curentul de iesire IO [A]
• Rezistenta de iesire [Ω]
., ctTVO
OO
CCdIdVR
========
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., ctVR
OI
CCLO dT
dITC====
====
., ctVR
O
OI
CCLO dT
dII1RTC
========
., ctTRCC
O
LdVdIPSRR
========
.,.,//
ctTRCC
O
O
CC
CCCC
OOIV
LctTLR
OCC dV
dII
VVdVIdIS
====
============
• Tensiunea minima de iesire [V]
• Coeficientul de temperatura [A/K]
• Coeficientul relativ de temperatura [1/K]
• Factorul de rejectie al tensiunii de alimentare (Power Supply Rejection Ratio) [A/V]
• Sensibilitatea curentului de iesire in raport cu variatiile tensiunii de alimentare [-]
![Page 5: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/5.jpg)
Caracteristica de iesire a unei surse de curentVOmin
IO
RO = (dIO/dVO)-1
VO
IO
![Page 6: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/6.jpg)
ClasificareI. Surse de curent elementare
- complexitate redusa- performante modeste
II. Surse de curent cascod- rezistenta de iesire mare- tensiune minima de iesire mare- tensiune minima de alimentare mare
III. Surse de curent cu autopolarizare- dependenta redusa IO (VCC)- necesita circuit de pornire
IV. Surse de curent compensate cu temperatura- dependenta redusa de temperatura- complexitare ridicata
![Page 7: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/7.jpg)
Sursa de curent bipolara cu un tranzistor
VO
ROIO
Q
R V
RVVI BE
O−−−−====
++++++++====
RrR1rR oO
ππππ
ββββ
CEsatBEO VVVV ++++−−−−====min
3.1.2. Surse de curent elementare
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VO
RO IO
Q
R V
(((( ))))
(((( ))))(((( )))) TTGSGSO
mdsO
2TGSO
OGS
VVVVVVVRg1rR
VV2KI
RIVV
−−−−====−−−−++++−−−−====++++====
−−−−====
++++====
min
(((( ))))(((( )))) OTGS
2TGSGS
IVV
VV2
KRVV
⇒⇒⇒⇒>>>>⇒⇒⇒⇒
−−−−++++====⇒⇒⇒⇒
Sursa de curent MOS cu un tranzistor
![Page 9: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/9.jpg)
Oglinda de curent bipolara VO VCC
Q2 Q1
R IO
RO
I
≅≅≅≅−−−−====
th
1BE1S
BECCV
VIR
VVI exp
≅≅≅≅
th
2BE2SO V
VII exp
2BE1BE VV ====
⇒⇒⇒⇒
1S
2SOII
II ≅≅≅≅
1S
2SBECCO I
IR
VVI −−−−≅≅≅≅⇒⇒⇒⇒
Curent de iesire
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O
A
2C
AoO I
VIVrR ============
Rezistenta de iesire
.min sat2CEO VV ====
Tensiune minima de iesire
Efect Early
++++
====−−−−====
A
1CE
th
1BE1S
BECCV
V1V
VIR
VVI exp
++++
====
A
2CE
th
2BE2SO V
V1V
VII exp
A
OA
1BE
1S
2S
A
2CEA
1CE
1S
2SO
VV1
VV1
II
VV1
VV1
II
II
++++
++++====
++++
++++====
2I2II
II
BB
BO++++
====++++
====ββββ
ββββββββ
ββββInfluenta ββββ
![Page 11: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/11.jpg)
SIMULARI pentru oglinda de curent bipolaraCaracteristica de iesire
![Page 12: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/12.jpg)
SIMULARI pentru oglinda de curent bipolaraCaracteristica de iesire
SIM 3.1: IC2 (V2)
![Page 13: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/13.jpg)
SIMULARI pentru oglinda de curent bipolaraCaracteristica de iesire
SIM 3.2: IC2 (V2), VA1 - parametru
![Page 14: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/14.jpg)
SIMULARI pentru oglinda de curent bipolaraDependenta curentului de iesire de tensiunea de alimentare
![Page 15: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/15.jpg)
SIMULARI pentru oglinda de curent bipolaraDependenta curentului de iesire de tensiunea de alimentare
SIM 3.3: IC2 (V1)
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Sursa de curent cu reducerea efectului ββββ (1)
121
1
1I2I
II
I
2B
B
BO ≅≅≅≅
++++++++
====
++++++++
====
ββββββββββββββββ
ββββ
R
RO IO
I
VCC
Q3
Q2 Q1
VO
Curent de iesire
RV2VII BECC
O−−−−====≅≅≅≅
O
A
2C
AoO I
VIVrR ============
.min sat2CEO VV ====
Rezistenta de iesire
Tensiune minima de iesire
Influenta ββββ
![Page 17: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/17.jpg)
R
IO I
VCC
Q3 Q2
Q1
VO
1
221
1
I12I
I12
II
2BB
BO ≅≅≅≅
++++++++
====
++++++++++++
++++++++
====
ββββββββββββββββββββ
ββββββββββββ )(
RV2VII BECC
O−−−−====≅≅≅≅
.min sat1CE2BEO VVV ++++====
Sursa de curent cu reducerea efectului ββββ (2)
Curent de iesire
Tensiune minima de iesire
Influenta ββββ
![Page 18: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/18.jpg)
R
IO’
I
VCC
Q3
Q2’ Q1
IO’’
Q2’’
IO’’’
Q2’’’
Sursa de curent multipla
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Oglinda de curent MOS
⇒⇒⇒⇒ ⇒⇒⇒⇒
Curentul de iesire
VO VDD
Q2 Q1
R IO
RO
I
1GSODD VRIV ++++====
(((( ))))2T1GSO VV
2KI −−−−====
(((( )))) 1GS2
T1GSDD VVV2
KRV ++++−−−−====
⇒⇒⇒⇒ (((( )))) )(, TDDT211GS VVKR21KR1
KR1VV −−−−++++±±±±−−−−====
![Page 20: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/20.jpg)
(((( )))) (((( ))))[[[[ ]]]]TDDTDD2O VVKR21VVKR1KR
1I −−−−++++−−−−−−−−++++====⇒⇒⇒⇒
O2dsO I
1rRλλλλ
========
KI2
VVVV OT2GSsat2DSO ====−−−−========min
(((( ))))TDDT1GS VVKR21KR1
KR1VV −−−−++++++++−−−−====
VGS trebuie sa fie mai mare decat VT:
1GS
O
1DS
2DS
1DS2
T1GS
2DS2
T2GSOV1V1
V1V1
V1VV2K
V1VV2K
II
λλλλλλλλ
λλλλλλλλ
λλλλ
λλλλ
++++++++
====++++++++
====++++−−−−
++++−−−−====
)()(
)()(
Efectul de modulare a lungimii canalului
Rezistenta de iesire
Tensiunea minima de iesire
![Page 21: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/21.jpg)
SIMULARI pentru oglinda de curent CMOSCaracteristica de iesire
![Page 22: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/22.jpg)
SIMULARI pentru oglinda de curent CMOSCaracteristica de iesire
SIM 3.4: ID2 (V2)
![Page 23: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/23.jpg)
SIMULARI pentru oglinda de curent CMOSCaracteristica de iesire
SIM 3.5: ID2 (V2), rds2 - parametru
![Page 24: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/24.jpg)
SIMULARI pentru oglinda de curent CMOSDependenta curentului de iesire de tensiunea de alimentare
![Page 25: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/25.jpg)
SIMULARI pentru oglinda de curent CMOSDependenta curentului de iesire de tensiunea de alimentare
SIM 3.6: ID2 (V1)
![Page 26: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/26.jpg)
VOVCC
Q2 Q1
R1 IO
RO
I
R2
Sursa de curent Widlar bipolara
1
BECCR
VVI −−−−====
2
S
Oth
Sth
2
2BE1BEO R
IIV
IIV
RVVI
−−−−
====−−−−====lnln
−−−−====
====
O1
BECC
2
th
O2
thO IR
VVRV
II
RVI lnln
Curentul de iesire
(((( )))) (((( ))))
++++++++++++====
++++++++++++====
11m22
2
O
A
11m22
2oO Rg1Rr
R1IV
Rg1RrR1rR
////// ππππππππ
ββββββββRezistenta de iesire
2Osat2CEO RIVV ++++==== .min
Tensiunea minima de iesire
![Page 27: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/27.jpg)
−−−−====O1
BECC
2
th
CCCC
OIRVV
RV
dVd
dVdI ln
(((( ))))
(((( ))))2O1
CC
O1BECCO1
BECC
O1
2
th
CC
O
IRdVdIRVVIR
VVIR
RV
dVdI
−−−−−−−−
−−−−====
O2
thBECC
th
2
CC
O
IRV1
VVV
R1
dVdI
++++
−−−−====
PSRR
Sensibilitatea curentului de iesire in raport cu variatiile tensiunii de alimentare
−−−−++++====
++++========
O1
BECCth
O2CC
O
O
CCIV
IRVV1
1
VIR1
1dVdI
IVS O
CCln
![Page 28: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/28.jpg)
Sursa de curent MOS
Curentul de iesire
Q2Q1
R2
R1 IO
VO VDD
I
RO
(((( ))))TDD111
T1GS VVKR21KR
1KR
1VV −−−−++++++++−−−−====
(((( ))))2T2GS
22GS2O2GS1GS VV
2KR
VRIVV −−−−++++====++++====
(((( )))) (((( ))))2DS2
T2GSO V1VV2KI λλλλ++++−−−−====
2OO
2Osat2DSO RIKI2RIVV ++++====++++====min
(((( ))))22m2dsO Rg1rR ++++====
)( T2GS VV >>>>
Rezistenta de iesire
Tensiunea minima de iesire
![Page 29: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/29.jpg)
Sursa de curent standard
O22BE11BE IRvIRv ++++====++++
(((( ))))2BE1BE12
O vvIRR1I −−−−++++====
++++====
1S
2S
O2
th
2
1OII
II
IRV
RR
II ln
1
BECCRRvVI
++++−−−−====
(((( ))))
++++++++++++++++====
11m22
22oO Rg1RrR
R1rR///ππππ
ββββ
Curentul de iesire
Rezistenta de iesire
Se poate determina I/IO deoarece:
Daca R1I >> vBE1 – vBE2:
2
1ORR
II
====
VOVCC
Q2Q1
R IO
RO
I
R2 R1
![Page 30: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/30.jpg)
Sursa de curent standard cu iesire multipla
Daca ariile tranzistoarelor sunt alese in asa fel incat densitatile de curent sa fie egale, atunci tensiunile baza-emitor vor fi egale.
R1
I3
IREF
VCC
Q1
Q3 Q2
I4 Q4
I5 Q5
R2 R3 R4 R5 R6
I6
Q6
![Page 31: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/31.jpg)
0AA
jAjAV
II
IIVvv
2
3
3
2th
2S
3S
3
REFth3BE2BE ====
====
====−−−− lnln
6BE2BE vv ======== ...
2REF66554433 RIRIRIRIRI ================
Deci:
si:
21
BECCREF RR
v2VI++++−−−−====
6
2REF6
3
2REF3 R
RIIRRII ======== ;...;
Cei patru curenti de iesire au expresiile:
unde:
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Sursa de curent utilizand ca referinta tensiunea baza-emitor
S1
BECC
2
th
2
1BEO IR
v2VRV
RvI −−−−======== ln
IO IREF
VCC
R1
R2
Q2
Q1
![Page 33: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/33.jpg)
3.1.3. Surse de curent cascod Sursa de curent cascod bipolara (1)
Q2
VA
V2
VO
ROIO
Q1
R V1
RO1
RVVI 1BE1
O−−−−====
2O1O2
1O2oO r
RrR1rR ββββββββ
ππππ≅≅≅≅
++++++++====
21
1o1O rRr
R1rR ππππππππ
ββββ >>>>>>>>
++++++++====
sat2CE2BE2sat2CEAO VVVVVV ++++−−−−====++++====min
Este necesar ca:
(((( )))) (((( ))))sat1CE12
sat1CE1BE12BE2
sat1CE1CE
VVVVVVVV
VV
>>>>−−−−⇔⇔⇔⇔⇔⇔⇔⇔>>>>−−−−−−−−−−−−⇔⇔⇔⇔
⇔⇔⇔⇔>>>>
Curentul de iesire
Rezistenta de iesire
Tensiune minima de iesire
![Page 34: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/34.jpg)
Sursa de curent cascod bipolara (2)Curentul de iesire
Rezistenta de iesire
Rv2VII BECC
O−−−−========
++++++++++++====
)///( 1m3O2
3O2oO g2RRr
R1rRππππ
ββββ
)///(, 1m23o3O g2RrrR ππππ>>>>>>>>====
Deci:
2oO rR ββββ≅≅≅≅
Tensiunea minima de iesire
sat2CEAO VVV ++++====min
BE2BE4BE1BEA vvvvV ====−−−−++++====
VOVCC
Q2Q1
R IO
RO
I
Q3Q4
RO3 A
![Page 35: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/35.jpg)
Sursa de curent cascod bipolara(3)
++++++++++++====
)///( 1m15O4
5O4oO g3RRr
R1rRππππ
ββββ
++++++++++++≅≅≅≅
3m25
25o5O g1Rr
R1rR/ππππ
ββββ
Deci:4oO rR ββββ≅≅≅≅
sat4CEAO VVV ++++====min
BEA v2V ====
====
−−−−====O2
th
2
5BE3BEO I
IRV
RvvI ln
1
BECCR
v3VI −−−−====
)///(, 1m145O g3RrR ππππ>>>>>>>>
IO
VCC
R2
R1
Q5
Q4
Q3
Q2
Q1
RO
RO5 A
I
Curentul de iesire
Rezistenta de iesire
Tensiunea minima de iesire
![Page 36: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/36.jpg)
Q2
VA
V2
VO
ROIO
Q1
R V1
RO1
(((( ))))
(((( ))))(((( ))))
(((( )))) T2T2GS2GS2minO
m1ds1O
2dsm1Om2dsO
2T1GSO
O1GS1
VVVVVVV
Rg1rRrgRg1rR
VV2KI
RIVV
−−−−====−−−−++++−−−−====
++++====≅≅≅≅++++====
−−−−====
++++====(((( ))))
(((( )))) OT1GS
2T1GS1GS1
IVV
VV2
KRVV
⇒⇒⇒⇒>>>>⇒⇒⇒⇒
−−−−++++====⇒⇒⇒⇒
(((( )))) (((( ))))
KI2VVVVV
VVVVVVV
OTGSsat1DS12
sat1DS1GS12GS2
sat1DS1DS
====−−−−====>>>>−−−−⇔⇔⇔⇔
⇔⇔⇔⇔>>>>−−−−−−−−−−−−⇔⇔⇔⇔⇔⇔⇔⇔>>>>
Este necesar ca:
Curentul de iesire
Rezistenta de iesire
Tensiunea minima de iesire
Sursa de curent cascod MOS (1)
![Page 37: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/37.jpg)
VO
IO
VDD
I
Q3 Q2
Q1Q4
RO
A
3DS
2DSOV1V1
II
λλλλλλλλ
++++++++
====
(((( )))) 2dsm2ds1m1dsO rgrg1rR ≅≅≅≅++++====
KI22VVV2V TTGSO ++++≅≅≅≅−−−−====min
(((( ))))TGSGSsat1DSAO VVVVVV −−−−++++====++++====min
Curentul de iesire
Rezistenta de iesire
Tensiunea minima de iesire
Sursa de curent cascod MOS (2)
![Page 38: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/38.jpg)
SIMULARI pentru oglinda de curent CMOS cascodCaracteristica de iesire
![Page 39: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/39.jpg)
SIMULARI pentru oglinda de curent CMOS cascodCaracteristica de iesire
SIM 3.7: ID2 (V2)
![Page 40: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/40.jpg)
SIMULARI pentru oglinda de curent CMOS cascodCaracteristica de iesire
SIM 3.8: ID2 (V2), rds2, rds4 - parametri
![Page 41: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/41.jpg)
SIMULARI pentru oglinda de curent CMOS cascodDependenta curentului de iesire de tensiunea de alimentare
![Page 42: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/42.jpg)
SIMULARI pentru oglinda de curent CMOS cascodDependenta curentului de iesire de tensiunea de alimentare
SIM 3.9: ID2 (V1)
![Page 43: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/43.jpg)
VO
VDD
I2 = I I1 = I
Q2Q3
Q1Q4Q5
IO
W/L W/L
(W/L)/(n+1)2 (W/L)/n2(W/L)/n2
IO
RO
IIO ====
(((( )))) 2dsm2ds1m1ds0 rgrg1rR ≅≅≅≅++++====
(((( ))))2T5GS2
VV1nLW
2KI −−−−
++++====
)(/'
(((( ))))2T41GS2VV
nLW
2KI −−−−==== )(
/'
(((( ))))2T32GS VVLW2KI −−−−==== )()/('
⇒⇒⇒⇒
Curentul de iesire
Rezistenta de iesire
Tensiunea minima de iesire
Sursa de curent cascod MOS (3)
![Page 44: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/44.jpg)
(((( )))) (((( )))) sat2DST2GST1GST5GS1GS5GS2DS VVVVVVVVVV ====−−−−====−−−−−−−−−−−−====−−−−====
(((( ))))(((( )))) (((( ))))KI21nVV1nVVV T2GS2DSsat1DSO ++++====−−−−++++====++++====min
⇒⇒⇒⇒
(((( ))))(((( ))))T32GST5GS VV1nVV −−−−++++====−−−− )(
(((( ))))T32GST41GS VVnVV −−−−====−−−− )()(
Tensiunea drena-sursa a tranzistorului Q2 este:
Deci, Q2 este polarizat la limita de saturatie. Rezulta:
![Page 45: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/45.jpg)
3.1.4. Surse de curent cu autopolarizareOglinda de curent
RvVI BECC
O−−−−====
1VI
IVS
CC
O
O
CCIV
OCC
≅≅≅≅∂∂∂∂∂∂∂∂====
Sursa de curent Widlar bipolara
O2
thO I
IRVI ln====
∂∂∂∂∂∂∂∂−−−−
∂∂∂∂∂∂∂∂====
∂∂∂∂∂∂∂∂
CC
O2OCCO
O
2
th
CC
OVI
II
VI
I1
II
RV
VI
CCO2
th2
th
CC
OV
I
IRV1
IRV
VI
∂∂∂∂∂∂∂∂
++++====
∂∂∂∂∂∂∂∂
th
O2CCth
O2CC
CC
O
O
CCIV
VIR1
1V
I
VIR1
1I
VVI
IVS O
CC ++++≅≅≅≅
∂∂∂∂∂∂∂∂
++++====
∂∂∂∂∂∂∂∂====
![Page 46: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/46.jpg)
S1
BECC
2
thO IR
v2VRVI −−−−==== ln
Sursa de curent utilizand ca referinta tensiunea baza-emitor
S1BECC
S1
2
th
CC
OIR1
v2VIR
RV
VI
−−−−≅≅≅≅
∂∂∂∂∂∂∂∂
%4vVSBE
thIV
OCC
≅≅≅≅≅≅≅≅
![Page 47: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/47.jpg)
S
REF
2
th
2
1BEO I
IRV
RvI ln========
A
BECC
A
BEA
BECC
O
REFV
v2V1
Vv1
Vv2V1
II −−−−++++≅≅≅≅
++++
−−−−++++====
−−−−++++++++====⇒⇒⇒⇒A
BECC
2
th
S
O
2
thO V
v2V1RV
II
RVI lnln
)( CCA2
th
CC
OVVR
VVI
++++====
∂∂∂∂∂∂∂∂
CC
ABE
thIV
VV1
1vVS O
CC++++
≅≅≅≅
⇒⇒⇒⇒
Derivand:
rezulta:
IO IREF
VCC
R2
Q2
Q1
Q6Q5
IO
Q4
IO
Q3
Sursa de curent cu autopolarizare utilizand ca referinta tensiunea baza-emitor
![Page 48: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/48.jpg)
Sursa de curent Widlar cu autopolarizare
2
2BE1BEO R
vvI −−−−====
++++
====
1S
2S
2
th
O
REF
2
thO I
IRV
II
RVI lnln
++++
++++≅≅≅≅1S
2S
2
th
A
CC
2
thO I
IRV
VV1
RVI lnln
≅≅≅≅
1S
2SA
CCIV
II1
VVS O
CCln
IO IREF
R2
Q2Q1
Q6Q4
IO
Q3
IO
Q5
VCC
![Page 49: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/49.jpg)
R
IO
VDD
Q5 Q4
Q3
Q2
Q1
IO
Sursa de curent MOS cu autopolarizare (1)
(((( ))))2TGS
GSO VV
2K
RV
I −−−−========
(((( )))) 0V2
KRVKRV1V2
KR 2TGST
2GS ====++++++++−−−−
KR1KRV2
KR1VV T
T21GS++++
±±±±++++====,
KR1KRV2
KR1VV T
TGS++++
++++++++====
(((( ))))TT2O KRV21KRV1KR
1I ++++++++++++====
Curentul de iesire
Rezolvand ecuatia pentru VGS rezulta:
Deci:
![Page 50: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/50.jpg)
Sursa de curent MOS cu autopolarizare (2)
IO
VDD
Q6 Q5
Q4 Q3
Q2 Q1
++++++++====
====
++++++++
SO
thO
T
SO
thO
T
I10IlnV
KI2V
IIlnV
K4I2V
(((( ))))[[[[ ]]]]2thO 10lnVK2I ====
Curentul de iesire
Rezulta:
qkTVth ==== - tensiunea termica
![Page 51: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/51.jpg)
Sursa de curent MOS cu autopolarizare (3)
VDD
R2
R1 Q1
Q3 Q2
Q6 Q5 Q4
IO I IO
B A
11EB
O RV
I ====
Pentru tranzistoare MOS identice,VA = VB, deci:
Curentul de iesire
![Page 52: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/52.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (3)Dependenta curentului de iesire de tensiunea de alimentare
![Page 53: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/53.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (3)Dependenta curentului de iesire de tensiunea de alimentare
SIM 3.10: ID2 (V1)
![Page 54: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/54.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (3)Dependenta curentului de iesire de temperatura
![Page 55: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/55.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (3)Dependenta curentului de iesire de temperatura
SIM 3.11: ID2 (t)
![Page 56: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/56.jpg)
Sursa de curent MOS cu autopolarizare (4)
Se poate demostra ca VA = VB, deci:
Curentul de iesire
VDD
R2R1
Q7Q1
Q3Q2
Q6Q5Q4
IO
W/L n(W/L)
B A W/L n(W/L)
(((( ))))nlnRV
RVV
I1th
1
7BE1BEO ====
−−−−====
![Page 57: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/57.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (4)Dependenta curentului de iesire de temperatura
![Page 58: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/58.jpg)
SIMULARI pentru sursa de curent MOS cu autopolarizare (4)Dependenta curentului de iesire de temperatura
SIM 3.12: ID2 (t)
![Page 59: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/59.jpg)
Sursa de curent MOS cu autopolarizare (5)
+ -
R1R2
R3
VDD
Q3
Q6 Q5
Q9
VO
AQ2
Q4
IOW/L n(W/L)
W/L n(W/L)
W/L
NM
Q1 Q7 Q8
3GS2GS VV ====
(((( ))))nlnVRR
RVVRV th
12
17EB1EB
2R2 ====−−−−====
(((( ))))
++++====⇒⇒⇒⇒ )T(VnlnVRR
RI)T(I 8EBth
12
3O
++++++++====
OEB T
TlnCTBTA)T(V
![Page 60: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/60.jpg)
Sursa de curent MOS cu autopolarizare (5) – cont.
+ -
R1R2
R3
VDD
Q3
Q6 Q5
Q9
VO
AQ2
Q4
IOW/L n(W/L)
W/L n(W/L)
W/L
NM
Q1 Q7 Q8
(((( ))))
++++++++++++====⇒⇒⇒⇒
O12
3O T
TlnCTBTAnlnq
kTRR
RI)T(I
Conditia de corectie liniara a caracteristicii poate fi scrisa astfel:
(((( )))) 0nlnqk
RRB
12 ====++++
++++====
O3O T
TlnCTARI)T(I
Rezulta:
![Page 61: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/61.jpg)
3.2. Surse de tensiune
![Page 62: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/62.jpg)
3.2.1. ClasificareI. Surse de tensiune elementare
- complexitate redusa- performante modeste
II. Surse de tensiune cu reactie- rezistenta de iesire redusa- complexitate medie
III. Surse de tensiune compensate cu temperatura- dependenta redusa de temperatura a tensiunii de iesire- complexitate ridicata
3.2. Surse de tensiune
![Page 63: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/63.jpg)
D
R
C
A
EC iOiI
vOvI RL
Surse de tensiune cu stabilizare serie (schema bloc)
D = bloc de divizareC = bloc de comparareR = circuit de referintaA = amplificatorEC = element de control
3.2.2. Surse de tensiune cu reactie
![Page 64: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/64.jpg)
D
R
C
A
EC
iOiI
vOvI RL
D = bloc de divizareC = bloc de comparareR = circuit de referintaA = amplificatorEC = element de control
Surse de tensiune cu stabilizare paralel (schema bloc)
![Page 65: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/65.jpg)
BEZO VVv −−−−====
iI
R
vO RL
Q iO
VZ D
vI
(((( )))) Z1
2ZBEO V
RR1VVv >>>>
++++++++====vO vI
RL
D R1
R2
R
Exemple de surse de tensiune
![Page 66: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/66.jpg)
++++====2
1ZO R
R1Vv
++++====1
2ZO R
R1Vv
R6 R2
R1R4 R5 R3
vO
D
Q’ Q’’
R6R2
R1R4R5
R3
vO
D
Q’Q’’
(((( ))))
++++++++====2
1BEZO R
R1VVv '
vI
D
vO
RL
R2
R1R3R4
Q
![Page 67: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/67.jpg)
vI
VR -
+ Q
RL
vO
R2
R1
++++====
++++====
2
1RO
21
2OR
RR1VV
RRRVV
VR
VCC
-VCC
VO
Q2
Q1
R2
R1
+-
++++====
++++====
2
1RO
21
2OR
RR1VV
RRRVV
![Page 68: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/68.jpg)
VR
VCC
Q2
Q1
Q3
R2 R3'
R1
R3'' = R3'
Q4
+-
+-
- VCC
VO+
VCC
-VCC- VCC
VO -
++++−−−−−−−−++++
++++
++++
−−−−====⇒⇒⇒⇒−−−−====
++++====
++++====
OO3
O
3
O
2
1RO
21
2OR
VVRV
RV
RR1VV
RRRVV
'''
![Page 69: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/69.jpg)
rV
rVVVI DBE2D1D
OL ≅≅≅≅−−−−++++====
IO Q
D2 D1
r
R4
Protectia la suprasarcina (1)
rVI BE
OL ====
IO Q r
R4
T1
VO
VCC
- VCC
-VCC
VR
Q2
AO2
R2
R1
AO1 Q1 +
-+
-
VCC
++++====
++++====
2
1RO
21
2OR
RR1VV
RRRVV
![Page 70: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/70.jpg)
Q2
Q3R
VCC
Circuit de limitare a curentului
VO
I
IO
Q1
Protectia la suprasarcina (2)
RVI 3BE
OL ====
![Page 71: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/71.jpg)
+-REF
circuitul BA 723
![Page 72: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/72.jpg)
Sursa de tensiune pentru VO < VR
R31
1RO V
RRRVV <<<<++++
====sc
BEOsc R
VI ====
+-
VO
VR
R3
REF
RL
RSC
R2
R1
Q3
Q2
Q1
VCC
![Page 73: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/73.jpg)
scBE
Osc RV
I ====R12
ROR21
1O V
RR1VVV
RRRV >>>>
++++====⇒⇒⇒⇒====++++
+-
VO
VR R3 REF
RL
RSC
R2 R1
Q3
Q2
Q1
VCC
Sursa de tensiune pentru VO > VR
![Page 74: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/74.jpg)
Referinte de tensiune bandgap (banda interzisa)
A
ΣΣΣΣ
AVthVth
VBE
VO=VBE+AVth
Vth
3.2.3. Surse de tensiune compensate cu temperatura
![Page 75: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/75.jpg)
====
)()(ln)(
TITIVTV
S
CthBE
−−−−====
th
GOS V
ECTTI exp)( ηηηη
++++====⇒⇒⇒⇒ ηηηηCTTI
qkTETV C
0GBE)(ln)(
++++==== ηηηη
O
OCOGOOBE
CTTI
qkTETV )(ln)(
ααααBTTIC ====)(
⇒⇒⇒⇒
−−−−++++
−−−−++++====⇒⇒⇒⇒OO
GOOBEGOREF T
Tq
KTTT
ETVETV ln)()()( ηηηηαααα
0KmV12T
ETVO
GOOBE <<<<−−−−≅≅≅≅−−−− /.)(
Dependenta de temperatura a tensiunii VBE
![Page 76: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/76.jpg)
)()( TVDVTV 2BEthREF ++++====
++++++++====
OBE T
TCTBTATV ln)(⇒⇒⇒⇒
++++
++++++++====O
REF TTCTT
qkDBATV ln)(⇒⇒⇒⇒
++++====⇒⇒⇒⇒====++++
OREF T
TCTATV0qkDB ln)(
Functionarea referintelor de tensiune
![Page 77: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/77.jpg)
Referinta de tensiune (1)
+
-
I1
VREF
Q2 Q1
R3
R2 R1
I2
====
−−−−====
1
2
33
1BE2BE1 I
IqRkT
RVV
I ln
2211 RIRI ====
⇒⇒⇒⇒
⇒⇒⇒⇒
====2
1
31 R
RqRkTI ln
)()()( TVRTITV 2BE11REF ++++====
++++++++====
OBE T
TCTBTATV ln)(⇒⇒⇒⇒
⇒⇒⇒⇒
++++
++++++++====O2
1
3
1REF T
TCTTRR
RR
qkBATV lnln)(
V21ATTCTATV0
RR
RR
qkB
OREF
2
1
3
1 ,ln)(ln ≅≅≅≅≅≅≅≅
++++====⇒⇒⇒⇒====
++++
![Page 78: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/78.jpg)
VREF
t
![Page 79: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/79.jpg)
VO
Q3Q2 Q1
Q5 Q4
Q8Q7Q6
R2
VDD
R1
B A
I
Referinta de tensiune (2)
(((( )))) (((( ))))4
4D
5
5DT4GST5GS4GS5GSBA K
I2KI2VVVVVVVV −−−−====−−−−−−−−−−−−====−−−−====−−−−
−−−−====
−−−−====−−−−
4
5
7D
6D
5
5D
4
5
5D
4D
5
5DBA LW
LWII1
KI2
KK
II1
KI2VV
)/()/(
![Page 80: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/80.jpg)
BA7
6
5
4 VVLWLW
LWLW ====⇒⇒⇒⇒====
)/()/(
)/()/(
++++====
7
6
1
2BEO LW
LWq
kTRRTVTV 3 )/(
)/(ln/)(/)(
++++++++====
0BE T
TCTBTATV ln/)(/
++++====⇒⇒⇒⇒
0O T
TCTATV ln)(
−−−−====−−−−
7
6
4
55DBA LW
LWLWLW1
KI2VV
)/()/(
)/()/(
Pentru:
21
BEBEBE2BEO R
RTVTV
TVRTITVTV 2133
/)(//)(//)(/)(/)(/)(
−−−−++++====++++====⇒⇒⇒⇒
7D
6D
1
2BEO I
Iq
kTRRTVTV
3ln/)(/)( ++++====
0LWLW
qk
RRB
7
6
1
2 ====
++++
)/()/(ln
![Page 81: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/81.jpg)
SIMULARE pentru referinta de tensiune (2)Dependenta de temperatura a tensiunii de referinta
![Page 82: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/82.jpg)
SIMULARE pentru referinta de tensiune (2)Dependenta de temperatura a tensiunii de referinta
SIM 3.13: VD5 (t)
![Page 83: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/83.jpg)
+
-VO
Q2 Q1
R5 R7
R6
R4
R3
R2 R1
AIC1 IC2
++++++++
++++====⇒⇒⇒⇒
2
1th
2
1
4
5BE
7
6O R
RVRR1
RRTV
RR1TV
2ln)()(
++++
++++====⇒⇒⇒⇒
07
6O T
TCTARR1TV ln)(
Referinta de tensiune (3)
1C
2C
4
th
4
1BE2BE1C I
IRV
RVVI ln====−−−−====
22C11C RIRI ====⇒⇒⇒⇒
2
1
4
th1C R
RRVI ln====⇒⇒⇒⇒
)()()( TVRIITV 2BE52C1CA ++++++++====
76
7OA RR
RTVTV++++
==== )()(⇒⇒⇒⇒
0BRR
qk
RR1
RR
2
1
2
1
4
5 ====++++
++++ ln
![Page 84: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/84.jpg)
Senzori de temperatura
+
-VO
R3
Q2Q1
R2
R5
R4
I1
R1
TctRRV
RRR1TV
1
2th
4
53O .ln)( ====
++++++++====⇒⇒⇒⇒
⇒⇒⇒⇒========−−−−====++++++++ 1
2th
2C
1Cth2BE1BE
543
4O R
RVIIVVV
RRRRTV lnln)(
Exemplu (1)
![Page 85: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/85.jpg)
VDD
VO
R2 R1
Q2Q1
Q4Q3
Q7 Q6Q5
BA
TctLWLWV
RR
RVV
RTIRTIRV6
5th
1
2
1
BEBE24D27D2O
21 .)/()/(ln)()( ====
====
−−−−============
Exemplu (2)
![Page 86: Surse de curent si surse de tensiune - ERASMUS Pulsewiki.dcae.pub.ro/images/archive/a/a1/20131030100446!CIA...Clasificare I. Surse de curent elementare - complexitate redusa - performante](https://reader030.vdocuments.net/reader030/viewer/2022033120/5e23a92a1fe98c22436fcbbb/html5/thumbnails/86.jpg)
Exemplu (3) – circuit de extragere a tensiunii de prag
I3 1:1 I1 I2
V2
VDD
VO
Q7 Q6 Q5
Q4
Q3 Q2Q1
K
KK
4K
4K
K
K
(((( ))))00TTTTGSGSO TTaVVKI2V
K4I2V2VV2V 34 −−−−++++========
++++−−−−
++++====−−−−====