The spec sheet for a given transistor contains the following table: hFE = 5 to 200 when IC = 1 mA hFE = 70 to 350 when IC = 10 mA hFE = 100 to 400 when IC = 20 mA hFE = 150 to 450 when IC = 100 mA
The transistor is being used in a circuit with the following values: VCC = 20 V, RC = 820 Ω, and RE = 180 Ω. What value of hFE should be used in the analysis of the circuit?
A) 100
B) 157
C) 200
D) None of these are correct.

Question

Quizplus · Accepted Answer

The value of hFE should be chosen based on the operating current. Assuming the circuit is designed to operate around IC = 10 mA, the typical hFE value would be around the midpoint of the range given for that current, which is approximately 157.

The Spec Sheet for a Given Transistor Contains the Following