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Author Topic: Is this opamp being used as a comparator?  (Read 1509 times)

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Offline dentakuTopic starter

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Is this opamp being used as a comparator?
« on: April 23, 2014, 11:55:34 pm »
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.
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Offline Hideki

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Re: Is this opamp being used as a comparator?
« Reply #1 on: April 24, 2014, 12:02:19 am »
Yes.

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Offline Rudane

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Re: Is this opamp being used as a comparator?
« Reply #2 on: April 24, 2014, 12:14:49 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.
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Voltage appears across and current flows through.
 

Offline dentakuTopic starter

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Re: Is this opamp being used as a comparator?
« Reply #3 on: April 24, 2014, 01:27:49 am »
Good.
Now I just need to build the thing for real :)
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