Question

What is the value of current gain in the hybrid-pi CE transistor model?

(a) hfe

(b) -hfe

(c) hre

(d) –hre

This question was posed to me by my school teacher while I was bunking the class.

My doubt stems from The Hybrid PI CE Transistor Model in section High Frequency Transistor of Electronic Devices & Circuits

Answer 1

The correct answer is (b) -hfe

For explanation I would say: The current gain of a common emitter (CE) amplifier can be expressed in terms of hybrid parameters in the hybrid-pi CE transistor model. The current gain hfe is the forward transfer characteristics and is used to calculate the current gain in common emitter amplifiers.