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During forward bias, the PIN diode acts as _______(a) a variable resistor(b) a variable capacitor(c) a switch(d) an LEDThis question was addressed to me in exam.My question is taken from p-i-n Diode and its Characteristics in division Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer»

The correct choice is (a) a variable resistor

The best EXPLANATION: In forward bias, the forward resistance decreases and acts as a variable resistor. The LOW FREQUENCY model of a PIN diode NEGLECTS the INPUT capacitive values.



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