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The emitter resistance in a differential amplifier is used to:
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- Provide a high output impedance
- Provide a high gain
- Bias the transistor in active region
- Provide a constant current source
Correct Option: C
The main purpose of emitter resistance in a differential amplifier made larger to maintain the proper quiescent current, in order to provide the stability to the transistor, or in other words to bias the transistor is active region.
