Question

Voltage-divider bias has a relatively stable Q-point, as does_________

(a) base bias

(b) collector-feedback bias

(c) emitter bias

(d) both base and emitter bias

I had been asked this question during an online exam.

My enquiry is from Input Bias and Offset Currents of the Bipolar Differential Amplifier topic in portion Differential and Multistage Amplifiers of Electronic Devices & Circuits

Answer 1

Correct choice is (b) collector-feedback bias

The best I can explain: The collector feedback biasing is also beta-independent. It has the same circuit as the voltage divider biasing except there is only one resistor used other than load resistor Rc. However, voltage divider biasing has the advantage that its stability factor is greater than that of collector feedback biasing.