Question

What is the magnitude of voltage generated at emitter circuit of a simplified CE hybrid model?

(a) hre × hfe / Ib × RL

(b) hre × hfe × Ib × RL

(c) hre × hfe / IC × RL

(d) hre × hfe × IC × RL

I had been asked this question in an internship interview.

My enquiry is from Simplified CE Hybrid Model in chapter Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer 1

Correct option 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 simplified CE hybrid model. The magnitude of voltage generated is equal to hre × hfe × Ib × RL where, RL is load resistance and Ib is the base current.