[sdiy] micro front end?

[lanterma at ece.gatech.edu]

You can do a lot remembering two formulas:

1) Inverting config: vo = -vi Rf / Ri

(input through Ri to negative op amp input, Rf from op amp output to negative op amp input, ground the positive op amp input)

2) Noninverting config: vo = vi (1 + Rf/Rg)

(input to positive input terminal of op amp, negative input terminal of op amp to ground through Rg, and Rf from op amp output to negative op amp input)

- Aaron