12.19 The pedagogical circuit of Problem 12.17 is used in place
of the operational amplifier shown in Example 12.1. The pole
frequencies are at 1 MHz, 12 MHz, and 50 MHz. Determine the phase
margin.
For reference:
12.17 Figure P12.17 shows a “Pedagogical Circuit” that is useful
for finding phase-margin and stability conditions with the help of
SPICE. Box zero uses a voltage-dependent voltage source (E0) to set
the AF product, while boxes 1, 2, and 3 use a similar...