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What is the purpose of using a difference amplifier?(a) Increase voltage gain(b) Decrease voltage gain(c) Increase current gain(d) Decrease current gainThe question was asked in a national level competition.Origin of the question is Transistor Difference Amplifiers topic in portion Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer»

Correct answer is (a) Increase VOLTAGE gain

The explanation: A circuit having a single transistor configuration does not provide suitable bandwidth or gain. The purpose of a difference AMPLIFIER is to provide an increase in the voltage gain. The total gain of a difference amplifier is the PRODUCT of the voltage GAINS of the discrete STAGES.



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