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A swamped amplifier has ________ input impedance as compared to CE stage amplifier.

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A swamped amplifier has ________ input impedance as compared to CE stage amplifier.

(a) smaller

(b) equal

(c) larger

(d) zero

This question was addressed to me in a national level competition.

My doubt is from Voltage Amplifiers topic in section Differential and Multistage Amplifiers of Electronic Devices & Circuits

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The correct option is (c) larger

The explanation: A swamped amplifier reduces variations in voltage gain by increasing the ac resistance of the emitter circuit to get a stable voltage gain. It is also referred as gain-stabilized amplifier. That’s why the input impedance is larger.

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