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Define total current (IQ) equation in differential amplifier with constant current bias current

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in Linear Integrated Circuits by (37.1k points)
Define total current (IQ) equation in differential amplifier with constant current bias current

(a) IQ=1/R3×(VEE/R1+R2)

(b) IQ =(VEE×R2)/(R1+R2)

(c) IQ=1/R3×(VEE×R2/R1+R2)

(d) IQ)=R3×(VEE/R1+R2)

The question was posed to me in an online interview.

I'm obligated to ask this question of Operational Amplifier Internal Circuit in section Operational Amplifier of Linear Integrated Circuits

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by (39.8k points)
The correct answer is (c) IQ=1/R3×(VEE×R2/R1+R2)

Here's the scoop: The equation for total current is obtained by applying Kirchhoff’s Voltage Law to constant current circuit in differential amplifier.

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