What exactly is offset of the amplifier? How do I measure it?
In my measure lecture, lecturer told me to measure the same voltage in right polarity and opposite polarity. It should be enough to compute offset, but I can't find how to do that.
I know the amplifier has gain \$100\$. And it's noninverting. Values were \$138\ mV\$ with right polarity and \$-152\ mV\$ in the opposite.
I've read, that ideal amplifier has zero Offset when input voltages are equal. So is it possible to say, that offset is the value of the amplifier, when inputs are equal? Than the offset in my case could be \$\frac{|138-152|}{2}\$?
If the scheme is somehow important:
Best Answer
Offset is (almost) always referred to the input. Your calculation is the output offset.
To find the offset voltage referred to the input, divide the output offset by the gain. In this case, -70\$\mu\$V.