By considering standard notations, in approximate analysis of the voltage-divider biasing configuration, which of the following conditions should be satisfied?

Question

Question

This question was previously asked in

UPSC ESE (Prelims) Electronics and Telecommunication Engineering 19 Feb 2023 Official Paper

Answer 1

The correct answer c.

Detailed solution:

The voltage divider configuration is shown in Figure 1.

F2 ENG Savita 10-1-24 D1

For stable collector current (I_C).

(1+β)R_E>> R_B

Now:

R_B = R₁ || R₂ = R₂

In design rule is much greater than indicated at least 10 time values higher.

(1+β)R_E≥ 10R_B

(1+β)R_E≥ 10R₂

β >> 1

(1+β)R_E≥ 10R₂

βR_E≥ 10R₂