⇒ ∣ADM∣ =100×0.12 = 12. 6. 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
Answer:A
⇒ ∣ADM∣ =100×0.12 = 12. 6. 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
Explanation: Constant current bias offers extremely large resistor under AC condition and thus provide high CMRR value. 7. What is the purpose of diode in differential amplifier with constant current circuit?