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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?

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    \$\begingroup\$ Can be done with an opamp and a diode. See my question here electronics.stackexchange.com/questions/372779/… \$\endgroup\$
    – Indraneel
    Commented May 14, 2021 at 10:13
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    \$\begingroup\$ Use an op-amp inverting amplifier... \$\endgroup\$
    – Circuit fantasist
    Commented May 14, 2021 at 11:11
  • \$\begingroup\$ Precision Rectifier \$\endgroup\$
    – brhans
    Commented May 14, 2021 at 12:48
  • \$\begingroup\$ Or add a suitable DC offset. Question is too unclear to answer, more context required. \$\endgroup\$
    – user16324
    Commented May 14, 2021 at 13:18
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    \$\begingroup\$ Swap the input wires? Need details on the nature of this 'negative' signal. Why does it need to 'stay positive'? \$\endgroup\$
    – Bruce Abbott
    Commented May 14, 2021 at 14:25

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