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To increase the value of CMRR, which circuit is used to replace the emitter resistance Re in differential amplifier?

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in Linear Integrated Circuits by (37.1k points)
To increase the value of CMRR, which circuit is used to replace the emitter resistance Re in differential amplifier?

(a) Constant current bias

(b) Resistor in parallel with Re

(c) Resistor in series with Re

(d) Diode in parallel with Re

This question was posed to me by my college director while I was bunking the class.

Asked question is from Operational Amplifier Internal Circuit in division Operational Amplifier of Linear Integrated Circuits

1 Answer

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by (39.8k points)
Correct answer is (a) Constant current bias

Check out the details: Constant current bias offers extremely large resistor under AC condition and thus provide high CMRR value.

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