What are the diodes (D1 & D2) used in comparator circuit usually refer to?

Q.  What are the diodes (D1 & D2) used in comparator circuit usually refer to?
- Published on 23 Oct 15

a. Clip Diodes
b. Clamp Diodes
c. PIN Diodes
d. Fast Recovery Diodes

ANSWER: Clamp Diodes
 
Comparator is a circuit which performs comparison between the signal voltage on one input of Op-amp with reference voltage on another input. The arrangement of diodes in comparator circuit is in such a way that they play a cardinal role in protecting Op-amp from getting damage due to excess of input voltage. These diodes intentionally undergoes clamping of difference input voltage to 0.7 or -0.7 volts. However, these diodes are also called as 'Clamp Diodes'.

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