5/27/2018
1
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[1]PEMICBGU
Analog Electronic Circuits
Prof. Mor M. Peretz
The Center for Power Electronics and Mixed-Signal IC
Department of Electrical and Computer Engineering
Ben-Gurion University of the Negev, ISRAEL
Emails: [email protected]
Website: http://www.ee.bgu.ac.il/~pemic
http://www.ee.bgu.ac.il/~analog
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[2]PEMICBGU
Lesson #7
Outline• Comparators
– Voltage comparator – basic characteristics
– Internal circuit
– Propagation time and overdrive
– Output stage
• Basic applications
– Level detection, window, counter, PWM, ON-OFF control
• Schmitt trigger
– Inverting and noninverting
– Single supply
• Advanced applications
– Oscillators
5/27/2018
2
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[3]PEMICBGU
Comparator
-
+
VOUT
Vin [V]
Vout [V]
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[4]PEMICBGU
Internal circuit
Simple differentialLM339 (TI)
5/27/2018
3
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[5]PEMICBGU
Internal circuit
Latched output
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[6]PEMICBGU
Propagation time and overdrive
(TI)
5/27/2018
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Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[7]PEMICBGU
Output stage
Push-pull Open-drain
(Open-Collector)
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[8]PEMICBGU
Basic operation
5/27/2018
5
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[9]PEMICBGU
Applications –basic
S. Franco
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[10]PEMICBGU
Applications –basic
+-
Vv
Vp
Vin
Vin
PWM
S. Franco
5/27/2018
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Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[11]PEMICBGU
Applications –basic
S. Franco
+
– K
Vref
C2
I2V2I1
Iin
V2
Vref
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[12]PEMICBGU
Comparator noise
t
[V]
VREF
VOL
VOH
Vin
t
VOL
VOH
Vout [V]
Vin
-
+
VOUT
A
VREF
5/27/2018
7
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[13]PEMICBGU
Schmitt Triggers
Inverting Schmitt Trigger
Vin [V]
Vout [V]VTL VTH
VOH
VOL
t
[V]
VTL
VTH
VOL
VOH
Vin
Vout
-
+ VOUT
R1
R2
AVin
𝑉𝑇𝐻 =𝑅1
𝑅1 + 𝑅2𝑉𝑂𝐻
𝑉𝑇𝐿 =𝑅1
𝑅1 + 𝑅2𝑉𝑂𝐿
VTC with hysteresis
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[14]PEMICBGU
Non-inverting Schmitt Trigger
t
[V]
VTL
VTH
VOL
VOH
Vin
Vout
Vin [V]
Vout [V]VTL VTH
VOH
VOL
-
+ VOUT
R1 R2
A
Vin
𝑉𝑇𝐻 = −𝑅1𝑅2
𝑉𝑂𝐿
𝑉𝑇𝐿 = −𝑅1𝑅2
𝑉𝑂𝐻
5/27/2018
8
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[15]PEMICBGU
Single-supply Schmitt Trigger
-
+ VOUT
R1 R3
A
R2
VCC
Vin
𝑉𝑇𝐻 =𝑅1
𝑅1 + 𝑅2||𝑅3𝑉𝐶𝐶
𝑉𝑇𝐿 =𝑅1||𝑅3
𝑅2 + 𝑅1||𝑅3𝑉𝐶𝐶
Vin [V]
Vout [V]VTL VTH
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[16]PEMICBGU
Single-supply Schmitt Trigger
𝑅1𝑅2
=𝑉𝑇𝐻 − 𝑉𝑇𝐿
𝑉𝐶𝐶
-
+ VOUT
R3 R4
A
Vin
R1
R2
VCC
-
+ VOUT
R3 R4
A
Vin
R1
R2
VCC
RD
RD for open-drain
𝑅3𝑅4
=𝑉𝐶𝐶 − 𝑉𝑇𝐿
𝑉𝑇𝐻
Vin [V]
Vout [V]VTL VTH
5/27/2018
9
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[17]PEMICBGU
Oscillators
𝑉𝑇𝐻 =𝑅1
𝑅1 + 𝑅2𝑉𝑂𝐻
𝑉𝑇𝐿 =𝑅1
𝑅1 + 𝑅2𝑉𝑂𝐿
𝑉 𝑡 = 𝑉∞ − 𝑉∞ − 𝑉0 𝑒−𝑡𝜏
t
[V]
VTL
VTH
VOL
VOH T1 T2 𝑇1:
𝑉∞ = 𝑉𝐸𝐸𝑉0 = 𝑉𝑇𝐻𝑉 𝑡 =𝑉𝑇𝐿
𝑇2:𝑉∞ = 𝑉𝐶𝐶𝑉0 = 𝑉𝑇𝐿𝑉 𝑡 =𝑉𝑇𝐻
-
+ VOUT
R1 R2
A
RVCC
C
VEE
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[18]PEMICBGU
Oscillators
programmed on/off
-
+ VOUT
R1 R2
A
RD1VCC
C
VEE
RD2
5/27/2018
10
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[19]PEMICBGU
Voltage-Controlled Oscillator
VCO
-
+ VOUT
R1 R2
A
RVCC
C
VEE
VinR
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[20]PEMICBGU
Oscillator
Single supply
-
+ VOUT
R1 R2
A
RVCC
C
VCC
5/27/2018
11
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[21]PEMICBGU
Voltage-Controlled Oscillator
Programmable freq
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[22]PEMICBGU
Σ-Δ ADC
5/27/2018
12
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[23]PEMICBGU
Phase-Locked-Loop
PLL
Phase
ComparatorLPF VCO
Freq.
Divider1/s
1/s fin
(fref) fout
foutƟout
Ɵin
VD Ve
VD
ƟD
VCC
π 2π
VCC/2XO
R SRFF
Q
QSET
CLR
S
R
fout
Ve
fmax
fmin
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[24]PEMICBGU
5/27/2018
13
Prof. Mor M. Peretz Analog Electronic Circuits 361-1-3671
THE CENTER FOR POWER ELECTRONICS AND MIXED-SIGNAL IC, BEN-GURION UNIVERSITY
[25]PEMICBGU