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What is the phase shift in RC coupled CE amplifier at lower 3dB frequency?(a) 180°(b) 225°(c) 270°(d) 100°I had been asked this question during a job interview.I'm obligated to ask this question of Low Frequency Response and Miller Effect Capacitance topic in portion Transistor Frequency Response of Analog Circuits |
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Answer» RIGHT option is (b) 225° The explanation is: Total PHASE SHIFT = 180°+ tan^-1(fL/f) At 3dB FREQUENCY fL/f = 1 Total phase shift = 180° + 45° = 225°. |
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