Question

What is the magnitude of voltage generated at emitter circuit of a hybrid-pi CE transistor model?

(a) hre × hfe / Ib × RL

(b) hre × hfe × Ib × RL

(c) hre × hfe / IC × RL

(d) hre × hfe × IC × RL

I got this question during an internship interview.

The doubt is from The Hybrid PI CE Transistor Model topic in chapter High Frequency Transistor of Electronic Devices & Circuits

Answer 1

Right answer is (b) hre × hfe × Ib × RL

For explanation I would say: The magnitude of voltage generated at emitter circuit of a common emitter (CE) amplifier can be expressed in terms of hybrid parameters in the hybrid-pi CE transistor model. The magnitude of voltage generated is equal to hre × hfe × Ib × RL where, RL is load resistance and Ib is the base current.