An amplifier with a dc gain of 60 dB has a single-pole, high-frequency response with a

Chapter 10, Problem 10.52

(choose chapter or problem)

An amplifier with a dc gain of 60 dB has a single-pole, high-frequency response with a 3-dB frequency of 100 kHz.

(a) Give an expression for the gain function A(s).

(b) Sketch Bode diagrams for the gain magnitude and phase.

(c) What is the gain–bandwidth product?

(d) What is the unity-gain frequency?

(e) If a change in the amplifier circuit causes its transfer function to acquire another pole at 1 MHz, sketch the resulting gain magnitude and specify the unity-gain frequency. Note that this is an example of an amplifier with a unity-gain bandwidth that is different from its gain–bandwidth product.

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