Question

What will be the temperature changes effects on the emitter feedback circuit?

(a) Increases voltage gain

(b) Increases current gain

(c) Does not affect the gain

(d) Decreases both current and voltage gain

I had been asked this question in my homework.

I want to ask this question from Emitter Feedback Bias in portion Transistor Biasing and Thermal Stabilization of Electronic Devices & Circuits

Answer 1

The correct option is (c) Does not affect the gain

For explanation I would say: Since the temperature changes IE value, these results in the increase of feedback through R_E, which in turn reduces Ib, resulting in constant gain, even though temperature effects beta and other transistor parameters, due to the feedback these effects are neutralized.