Lecture 18-Feedback and Port Impedances & Gain boosting

Lecture 18-Feedback and Port Impedances & Gain...

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EE 214 Lecture 18 (HO#26) B. Murmann 1 Lecture 18 Feedback and Port Impedances Gain Boosting Boris Murmann Stanford University murmann@stanford.edu Copyright © 2004 by Boris Murmann
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EE 214 Lecture 18 (HO#26) B. Murmann 2 Overview Reading – 8.8.2 (Closed-Loop Impedance Formula using Return Ratio) – 6.7 (MOS Active-Cascode Amplifiers) Reference – K. Bult, G.J.G.M. Geelen, "A fast-settling CMOS op-amp for SC circuits with 90-dB DC gain," IEEE J. Solid-State Circuits, Dec. 1990, pp. 1379 – 1384. Introduction – In order to complete our framework for feedback circuit analysis, we will study the effect of feedback on port impedances in today's lecture. A useful analytical tool for quick calculations is Blackman's Impedance Formula, which allows us to find port impedances based on a superposition of simple sub-analyses.
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EE 214 Lecture 18 (HO#26) B. Murmann 3 Using Feedback to Modify Port Impedances Our initial motivation for using feedback was to build precise gain elements that are insensitive to g
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This note was uploaded on 01/16/2011 for the course EE 214 taught by Professor Murmann,b during the Spring '04 term at Stanford.

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Lecture 18-Feedback and Port Impedances & Gain...

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