Question

Which 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

I had been asked this question during an interview.

Question is from Thermistor and Sensistor Compensation topic in portion Transistor Biasing and Thermal Stabilization of Electronic Devices & Circuits

Answer 1

Correct choice is (a) Bias stabilization

Easy explanation: 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 numerous variations, it plays a significant role in providing the stability to greater level especially for self-bias, fixed-bias and collector to base bias circuits.

Since the stability factor of circuit gets affected 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 thereby ensuring the confined level of bias stability to circuits.