Question

Which of the following process plays a crucial role in devising the independency of operating point over the variations in temperature or transistor parameters?

(a) Bias stabilization

(b) Bias compensation

(c) Bias stabilization & compensation

(d) No process

The question was asked in a job interview.

I want to ask this question from Frequency Compensation topic in section Frequency Response of Electronic Devices & Circuits

Answer 1

Right answer is (a) Bias stabilization

For explanation I would say: Bias stabilization is a process which makes the operating (Q) point independent of change in temperature or any change in transistor parameters.

As Q-point exhibits its independent nature over the several variations, it plays a major role in providing the stability to greater extent especially for self-bias, fixed-bias and collector to base bias circuits. Since the stability factor of circuit gets unnatural due to several variations, bias stabilization has a provision of maintaining the Q-point condition irrespective of the changes in temperature or transistor parameters and in that way ensuring the confined level of bias stability to circuits.