Question

What will be the reason of miller effect in BJT?

(a) inductance of collector load

(b) collector-to-emitter capacitance

(c) base-to-emitter capacitance

(d) base-to-collector capacitance

I have been asked this question by my school teacher while I was bunking the class.

Question is taken from Multitone Wideband FM topic in portion Angle Modulation of Analog Communications

Answer 1

The correct answer is (d) base-to-collector capacitance

The explanation: Miller effect is responsible for the increase in equivalent input capacitance of an inverting voltage amplifier. The increase equivalent input capacitance is given by, CM = C(1 + AV). In BJT, miller effect is due to base-to-collector capacitance.