ee-4232 feedback topologies - educypediaeducypedia.karadimov.info/library/feedback.pdf · 7...
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![Page 1: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/1.jpg)
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EE-4232
Feedback Topologies
![Page 2: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/2.jpg)
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The four basic feedback topologies: voltage-sampling series-mixing (series-shunt) topology
![Page 3: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/3.jpg)
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The four basic feedback topologies: current-sampling shunt-mixing (shunt-series) topology
![Page 4: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/4.jpg)
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The four basic feedback topologies: current-sampling series-mixing (series-series) topology
![Page 5: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/5.jpg)
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The four basic feedback topologies: voltage-sampling shunt-mixing (shunt-shunt) topology
![Page 6: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/6.jpg)
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The series-shunt feedback amplifier: (a) ideal structure; (b) equivalent circuit.
![Page 7: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/7.jpg)
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Measuring the output resistance of the feedback amplifier of Fig. (a): Rof ≡ Vt/I.
![Page 8: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/8.jpg)
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Derivation of the A circuit and β circuit for the series-shunt feedback amplifier. (a) Block diagram of a practical series-shunt feedback amplifier. (b) The circuit in (a) with the feedback network represented by its h parameters.
![Page 9: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/9.jpg)
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Derivation of the A circuit and β circuit for the series-shunt feedback amplifier. (c) The circuit in (b) after neglecting h21.
![Page 10: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/10.jpg)
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Summary of the rules for finding the A circuit and β for the
voltage-sampling series-mixing case.
![Page 11: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/11.jpg)
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![Page 12: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/12.jpg)
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The series-series feedback amplifier: (a) ideal structure; (b) equivalent circuit.
![Page 13: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/13.jpg)
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Measuring the output resistance Rof of the series-series feedback amplifier.
![Page 14: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/14.jpg)
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Derivation of the A circuit and β circuit for the series-series feedback amplifiers. (a) A series-series feedback amplifier. (b) The circuit of (a) with the feedback network represented by its z parameters.
![Page 15: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/15.jpg)
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Derivation of the A circuit and β circuit for the series-series feedback amplifiers. (c) A redrawing of the circuit in (b) after neglecting z21.
![Page 16: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/16.jpg)
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Finding the A circuit and β for the current-sampling series-mixing (series-series) case.
![Page 17: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/17.jpg)
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![Page 18: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/18.jpg)
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Ideal structure for the shunt-shunt feedback amplifier.
![Page 19: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/19.jpg)
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Block diagram for a practical shunt-shunt feedback amplifier.
![Page 20: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/20.jpg)
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Finding the A circuit and β for the voltage-sampling shunt-mixing (shunt-shunt) case.
![Page 21: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/21.jpg)
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Ideal structure for the shunt-series feedback amplifier.
![Page 22: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/22.jpg)
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Block diagram for practical shunt-series feedback amplifier
![Page 23: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/23.jpg)
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Finding the A circuit and β for the current-sampling shunt-mixing (shunt-series) case.
![Page 24: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/24.jpg)
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![Page 25: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/25.jpg)
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![Page 26: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/26.jpg)
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Bode plot for the loop gain Aβ illustrating the definitions of the gain and phase margins.
![Page 27: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/27.jpg)
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Stability analysis using Bode plot of |A|.
![Page 28: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/28.jpg)
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Frequency compensation for β = 10-2. The response labeled A’ is obtained by introducing an additional pole at fD. The A” response is obtained by moving the
original low-frequency pole to f’D.
![Page 29: EE-4232 Feedback Topologies - Educypediaeducypedia.karadimov.info/library/Feedback.pdf · 7 Derivation of the A circuit and βcircuit for the series-shunt feedback amplifier. (a)](https://reader030.vdocuments.net/reader030/viewer/2022012905/5aa053567f8b9a67178e16b9/html5/thumbnails/29.jpg)
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References
• Electronics by A. Hambley• Microelectronics Circuits by Sedra & Smith• Other books on Electronics