The node voltage at the top of the til resistor is closes to________________?
Correct answer: B. zero
- A. collector supply voltage
- B. zero
- C. emitter supply voltage
- D. tail current times base resistance
Explanation
With balanced inputs, the common-emitter node remains nearly at virtual ground, so the voltage at the top of the tail resistor is close to zero. This assumes the usual dual-supply differential-amplifier arrangement.
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