Question

Which of the following is not known as transition capacitance?

(a) Depletion region capacitance

(b) Space-Charge capacitance

(c) Nominal capacitance

(d) Junction capacitance

The question was posed to me in an online interview.

The query is from Transition Capacitance topic in chapter Diode Circuit of Analog Circuits

Answer 1

Correct option is (c) Nominal capacitance

Best explanation: Transition capacitance is the capacitance exhibited by a diode due to the p-side and n-side of the diode is separated by a distance of depletion width same as in an electrolytic capacitor. It occurs in a reverse biased diode. The other name for this is Junction capacitance, Space-Charge capacitance, Barrier capacitance, Depletion region capacitance. Diffusion capacitance is due to the transport of charge carriers between the two terminals of the device. It occurs in a forward biased diode.