Consider an RC coupled amplifier at low frequency. Internal voltage gain is -120. Find the voltage gain magnitude, when given that collector resistance = 1kΩ, load = 9kΩ, collector capacitance is 0. is 0.1μF, and input frequency is 20Hz.(a) 120(b) 12(c) 15(d) -12The question was asked by my college professor while I was bunking the class.This interesting question is from Low Frequency Response and Miller Effect Capacitance in chapter Transistor Frequency Response of Analog Circuits

Consider an RC coupled amplifier at low frequency. Internal voltage ga

1.	Consider an RC coupled amplifier at low frequency. Internal voltage gain is -120. Find the voltage gain magnitude, when given that collector resistance = 1kΩ, load = 9kΩ, collector capacitance is 0. is 0.1μF, and input frequency is 20Hz.(a) 120(b) 12(c) 15(d) -12The question was asked by my college professor while I was bunking the class.This interesting question is from Low Frequency Response and Miller Effect Capacitance in chapter Transistor Frequency Response of Analog Circuits
Answer» The correct OPTION is (c) 15 The best I can explain: AV = -120 fL = 1/2πCC(RC+RL) = 1/2π*0.001 = 1000/2π = 159.15Hz AV’ = \(\frac{\|AV\|}{\SQRT{1}} + (\frac{f_L}{f})^2\) AV’ = 120/8.02 ≈ 15.

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