Connection configuration of swamping resistor

Q.  What is the connection configuration of swamping resistor in case of a differential amplifier?
- Published on 26 Oct 15

a. In series with each emitter
b. In series with each collector
c. In parallel with each collector
d. In parallel with each emitter

ANSWER: In series with each emitter
 
External resistor of a differential amplifier is connected in series combination with each emitter. Due to this configuration, the dependability of voltage gain which varies in accordance to changes in emitter resistance can be ablated. Apart from this advantage, external resistor also possesses a beneficiary notion of increasing the linearity range of differential amplifiers.
However, the value of external resistor has an efficiently high value to swamp the consequences of emitter resistor of amplifier. As a result, this external resistor is also renowned as 'Swamping Resistor' because of its swamping strategy.

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