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Electronic Devices & Circuits Differential Amplifiers

For a perfectly balanced BJT differential pair with zero differential input and an ideal tail current of 2 mA, each transistor carries approximately?

A0 mA
B0.5 mA
C1 mA
D2 mA

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Correct Answer: C. 1 mA

Explanation: With matched devices and equal input voltages, the ideal 2 mA tail current divides equally, giving approximately 1 mA in each transistor.

Reference: Standard analog electronics: differential pair bias

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