Figure 7
-Refer to Figure 7. The input resistance of RIN(BASE)
A)depends on the fi of the transistor
B)depends on the resistance of RE
C)both A and B
D)none of the above

Question

Figure 7
-Refer to Figure 7. The input resistance of RIN(BASE)
A)depends on the fi of the transistor 
B)depends on the resistance of RE 
C)both A and B 
D)none of the above

Quizplus · Accepted Answer

The input resistance at the base of a transistor, RIN(BASE), depends on both the forward current gain (beta or fi) of the transistor and the resistance in the emitter (RE). The beta value influences the base current for a given emitter current, and the emitter resistance directly affects the input impedance by being part of the feedback loop in the common-emitter configuration.

Figure 7 -Refer to Figure 7. the Input Resistance of RIN(BASE)