Determine the condition for stability
Course:- Econometrics
Reference No.:- EM131099565

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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.


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