EE 214 Lecture 15 (HO#21)
B. Murmann
1
Lecture 15
Loop Gain Simulation
Boris Murmann
Stanford University
[email protected]
Copyright © 2004 by Boris Murmann
EE 214 Lecture 15 (HO#21)
B. Murmann
2
Overview
•
Introduction
–
Last lecture, we've seen that return ratio analysis is a useful
tool for characterizing feedback amplifiers in terms of
stability, bandwidth and static precision. Since we are always
interested in verifying our hand analysis results using
simulations, it is desirable to have an equivalent method
available in Spice. In this lecture, we will discuss the so
called Middlebrook method for loop gain simulation. This
particular approach helps overcome the issue that ideal loop
breakpoints, e.g. at controlled sources, are not directly
accessible in Spice.
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