Unlike a one-pole system, the magnitude response of the circuit in Example 12.38 falls by more than 3 dB at the pole frequency.
Determine |H| at ωp. Can we say |H| falls 9 dB due to three coincident poles?
Example 12.38
We wish to apply negative feedback with K = 1 around the three-stage amplifier shown in Fig. 12.67(a). Neglecting other capacitances and assuming identical stages, plot the frequency response of the circuit and determine the condition for stability.
Assume λ = 0.
