Electronics Engineering · Bipolar Junction Transistors
A bipolar junction transistor having a common emitter current gain (β) of 100 is operating in the active region with a collector current of 2 mA. Assuming that the thermal voltage VT is 25 mV, what is the small-signal input impedance (rπ) of the transistor?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 kΩ
- 21.25 kΩ✓
- 32 kΩ
- 42.5 kΩ
Correct answer
1.25 kΩ
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