Author Topic: Is this opamp being used as a comparator?  (Read 931 times)

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Offline dentaku

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Is this opamp being used as a comparator?
« on: April 24, 2014, 09:55:34 am »
Is U1a in this circuit simply being used as a comparator?
There's no feedback or anything, just DC a voltage into the inverting input and a square wave into the non-inverting.
 

Offline Hideki

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Re: Is this opamp being used as a comparator?
« Reply #1 on: April 24, 2014, 10:02:19 am »
Yes.

 

Offline Rudane

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Re: Is this opamp being used as a comparator?
« Reply #2 on: April 24, 2014, 10:14:49 am »
The key hint there, is the feedback loop is not closed. In most cases that I can think of, if that feedback loop isn't closed, the op-amp is being used as a comparator.
Voltage appears across and current flows through.
 

Offline dentaku

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Re: Is this opamp being used as a comparator?
« Reply #3 on: April 24, 2014, 11:27:49 am »
Good.
Now I just need to build the thing for real :)
 


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