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In class A operation, the operating point is generally located ____________ of the d.c. load line.(a) At cut off point(b) At the middle(c) At saturation point(d) In active regionI had been asked this question during an interview.The query is from Class A Output Stage topic in portion Differential and Multistage Amplifiers of Electronic Devices & Circuits

Answer»

The correct CHOICE is (b) At the middle

The best explanation: By referring to the output CHARACTERISTICS of the class A amplifier operation, the Q-point is placed exactly at the centre of the AC load LINE and the transistor conducts for every point in the INPUT waveform. Therefore, it lies in the middle of d.c. load line.



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