Given collector resistance = 2kΩ, load resistance = 5kΩ, collector capacitance = 1μF, emitter capacitance = 20μF, collector current = 2mA, source resistance = 2kΩ. If the effect of blocking capacitor is ignored, find the applicable cut-off frequency.(a) 22.73 Hz(b) 612 Hz(c) 673Hz(d) 317 HzThis question was addressed to me in an international level competition.I need to ask this question from Low Frequency Response and Miller Effect Capacitance in chapter Transistor Frequency Response of Analog Circuits

Given collector resistance = 2kΩ, load resistance = 5kΩ, collector c

1.	Given collector resistance = 2kΩ, load resistance = 5kΩ, collector capacitance = 1μF, emitter capacitance = 20μF, collector current = 2mA, source resistance = 2kΩ. If the effect of blocking capacitor is ignored, find the applicable cut-off frequency.(a) 22.73 Hz(b) 612 Hz(c) 673Hz(d) 317 HzThis question was addressed to me in an international level competition.I need to ask this question from Low Frequency Response and Miller Effect Capacitance in chapter Transistor Frequency Response of Analog Circuits
Answer» CORRECT CHOICE is (B) 612 Hz Explanation: RC = 2kΩ, RL = 5kΩ, CC = 1μF, CB = 10μF, CE = 20μF, RS = 2 kΩ hie = 1kΩ, IC = 2mA fL1 = 1/2πCC(RC+RL) = 22.73 Hz fL2 = gm/2πCE = IC/2πCEVT = 612 Hz Since fL2 > 4fL1, hence fL2 is the correct answer.

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