Question

What values of VBE and β would provide maximum stability?

(a) VBE = 5V, β = 50

(b) VBE = 4V, β = 100

(c) VBE = 4.5V, β = 50

(d) It is irrelevant

This question was posed to me in homework.

This interesting question is from Stabilization against Variations in VBE and Beta for Self Bias Circuit topic in division Transistor Biasing and Thermal Stabilization of Electronic Devices & Circuits

Answer 1

Correct answer is (d) It is irrelevant

The best I can explain: In a stable bias circuit, the variations in the value of VBE and β do not affect the stability of the system. The current through the emitter remains unchanged.