An op-amp voltage-follower has an input offset of 2 nV. What is the output error voltage?

Question

An op-amp voltage-follower has an input offset of 2 nV. What is the output error voltage?

Answer 1

The theoretical op-amp open loop output is:

Vout = (V+ - V-)*G

Where G is open loop gain.

If there is a 2nV input offset, the output will be off by 2 nV * G. If G is 1 million, it's 2V!

Answer 2

Output error voltage is 2 nV for a voltage follower with a gain of 1.

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