Comparators are classified into various
kinds, such as electronic, electrical, mechanical, optical, sigma, digital and pneumatic
comparators, these are used in various applications.
Comparators play an essential role in designing electrical and electronic projects.
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A basic op-amp comparator circuit can be used to detect either a positive or a negative going input voltage depending upon which input of the operational amplifier we connect the fixed reference voltage source and the input voltage too.
