Which of these is false for a CS amplifier without a bypass capacitor compared to a CS amplifier with a bypass capacitor?(a) Voltage gain magnitude decreases(b) Input resistance remains same(c) The output resistance decreases(d) The output is 180° out of phase with respect to the input appliedI have been asked this question at a job interview.The origin of the question is JFET Amplifier in division FET Amplifiers of Analog Circuits

Which of these is false for a CS amplifier without a bypass capacitor

1.	Which of these is false for a CS amplifier without a bypass capacitor compared to a CS amplifier with a bypass capacitor?(a) Voltage gain magnitude decreases(b) Input resistance remains same(c) The output resistance decreases(d) The output is 180° out of phase with respect to the input appliedI have been asked this question at a job interview.The origin of the question is JFET Amplifier in division FET Amplifiers of Analog Circuits
Answer» Correct ANSWER is (c) The output RESISTANCE decreases To explain: For a CS AMPLIFIER without a bypass capacitor, the input resistance is unchanged and output resistance increase. RI = RG for both. RO = rds with bypass capacitor and rds = rds + (1+μ) RS without a bypass capacitor. Output is still 180° out of phase COMPARED to applied input, but the GAIN decreases.

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