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What is the purpose of using a cascading transistor configuration?

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What is the purpose of using a cascading transistor configuration?

(a) Increase voltage gain

(b) Decrease voltage gain

(c) Increase current gain

(d) Decrease current gain

I had been asked this question in my homework.

Origin of the question is The Cascode Transistor Configuration in portion Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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The correct option is (a) Increase voltage gain

Explanation: A circuit having a single transistor configuration does not provide suitable bandwidth or gain. The purpose of a cascading transistor configuration is to provide an increase in the voltage gain. The total gain of a cascading transistor configuration is the product of the voltage gains of the discrete stages.

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