How do I make an incoming negative signal a positive one?

Asked May 14 '21 at 10:05

Active May 14 '21 at 11:14

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I am looking for a way to make a negative signal to a positive one. A positive signal has to stay positive. Does someone know how it can be done?

edited May 14 '21 at 11:14

Circuit fantasist

asked May 14 '21 at 10:05

electrococuk

1

Can be done with an opamp and a diode. See my question here https://electronics.stackexchange.com/questions/372779/unsigned-op-amp-output – Indraneel May 14 '21 at 10:13
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Use an op-amp inverting amplifier... – Circuit fantasist May 14 '21 at 11:11
[Precision Rectifier](https://en.wikipedia.org/wiki/Precision_rectifier) – brhans May 14 '21 at 12:48
Or add a suitable DC offset. Question is too unclear to answer, more context required. – May 14 '21 at 13:18
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Swap the input wires? Need details on the nature of this 'negative' signal. Why does it need to 'stay positive'? – Bruce Abbott May 14 '21 at 14:25
@BruceAbbott lol, that occurred to me first too:) – Martin James May 14 '21 at 14:55

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