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Are comparators and op-amps the same?
The difference between an op-amp comparator and a voltage comparator is in the output stage as a standard op-amp has an output stage that is optimized for linear operation, while the output stage of a voltage comparator is optimized for continuous saturated operation as it is always intended to be close to one supply …
What circuits use comparators?
An op-amp operates on analog input. It can be used to amplify or attenuate this input, and to carry out mathematical operations such as addition, subtraction, integration, and differentiation. Because of their wide range of uses, op-amps are encountered in most electric circuits.
How many resistors are needed for an op amp comparator circuit?
Consider the voltage level detector circuit below. As above, the voltage divider network provides a set of reference voltages for the individual op-amp comparator circuits. To produce the four reference voltages will require five resistors.
Can a non inverting amplifier be used as a comparator?
If the non inverting input is higher than the inverting one, then the output is high. If the non-inverting input is lower than the inverting one then the output is high. Whilst it is easy to use an operational amplifier as a comparator, especially when it may be easy to use one if a chip containing multiple op amps has one spare.
How are comparator chips and op amps different?
The performance of comparator chips and op amps is quite different in a number of aspects: Op amp latch-up: Under some conditions, especially when an op amp is being driven hard it is possible for it to latch up, i.e. even when the input changes, the output remains the same.
What happens to the op amp comparator when Vin is slow?
Op-amp Comparator with Positive Feedback. However if the input signal, VIN is slow to change or electrical noise is present, then the op-amp comparator may oscillate switching its output back and forth between the two saturation states, +Vcc and -Vcc as the input signal hovers around the reference voltage, VREF level.