Hi, I was wondering if this op amp is running at unity gain? I know with just the two 22k resistors it is. But with 3, I don't know. Anyone have some insight?
It’s an inverting summing amp with two inputs (it basically adds the two signals together and inverts). For inputs of +1V & +1V you get –2V at the output. For inputs of +1V,-1V you get 0V at the output, +1V & 0V = -1V, and so forth.