Electronics > Projects, Designs, and Technical Stuff
Provide offset voltage for non-inverting amplifier
miketan3904:
Hi guys! Does anyone has any idea to shift the output voltage of an non-inverting amplifier up by 2V? How can I introduce an offset voltage to the non-inverting amplifier? I do not want to use another op amp to shift the output voltage.
Zero999:
http://earmark.net/gesr/opamp/gain_offset.htm
OM222O:
there doesn't exist a such thing.
For an inverting amplifier, you can create a summing amplifier which allows you to add offsets, there exists a non inverting summing amplifier, BUT it has many issues, so nobody actually uses it.
The only other solution that allows you to do that is using a differential amplifier which has an offset pin, but that requires "a different op amp" (assuming you have one already).
You can also chain a second op amp but again, that's a new op amp added.
Zero999:
--- Quote from: OM222O on August 01, 2020, 04:02:01 pm ---there doesn't exist a such thing.
For an inverting amplifier, you can create a summing amplifier which allows you to add offsets, there exists a non inverting summing amplifier, BUT it has many issues, so nobody actually uses it.
The only other solution that allows you to do that is using a differential amplifier which has an offset pin, but that requires "a different op amp" (assuming you have one already).
You can also chain a second op amp but again, that's a new op amp added.
--- End quote ---
Nonsense. It's fairly easy to add a 2V offset to a signal. Look at the site I linked to in my previous post.
OM222O:
--- Quote from: Zero999 on August 01, 2020, 04:17:31 pm ---Nonsense. It's fairly easy to add a 2V offset to a signal. Look at the site I linked to in my previous post.
--- End quote ---
The website you provided shows absolutely no circuit / actual values?
It's easy to remove DC offset (AC coupling) but not to add it.
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