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Which of the following statement is true about FET common source amplifier compared to BJT amplifier?

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Which of the following statement is true about FET common source amplifier compared to BJT amplifier?

(a) It has High input impedance

(b) It has low input impedance

(c) No input Voltage is needed

(d) Input Voltage is needed

The question was posed to me by my college director while I was bunking the class.

My enquiry is from The Common Source Amplifier topic in portion Field-Effect Transistors of Electronic Devices & Circuits

1 Answer

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Correct answer is (a) It has High input impedance

Explanation: FET due to its physical nature has very high input impedance; hence the voltage drop in input side will be very less making the entire signal to pass through the input port.

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