What is an inverting summer circuit and how does it work?
2007-09-02 20:59:52 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
It's an op-amp circuit with input voltages V1, V2....Vn, input resistors R1, R2..... Rn, and a feedback resistor Rf. It's transfer function is
Vout = -Rf(V1/R1 + V2/R2 + .....Vn/Rn)
If you understood my answer about inverting amplifiers, this should be no problem to understand.
And they work quite well ☺
Doug
2007-09-02 21:10:17 · answer #1 · answered by doug_donaghue 7 · 1⤊ 0⤋
Yeah these circuits are used in audio conditioning applications. Sometimes people use them to add various audible signals and amplify the sum a.k.a. a mixer.
You can find monolithic (all one package) solutions as well but first google for a schematic for a simple DC case. My $0.02
2007-09-03 13:58:02 · answer #2 · answered by D 3 · 0⤊ 0⤋