What is the gain of this circuit?

[johnkaz77]

Hi everyone!

I found this circuit which is supposed to be offset voltage adjustment, can anyone tell me what's the gain of the upper amplifier? Thank you.

 

[alec_t]

Gain = (R18+R20)/R20 = 3.2

 

[johnkaz77]

Thank you very much!

 

[crutschow]

Gain = (R18+R20)/R20 = 3.2

Check your math.

 

[ericgibbs]

Check your math.

(2200+1000) = 3200 ,,, 3200/1000 = 3.2

I prefer the usual way G+= 1+ 2.2k/1k = 1+ 2.2 = 3.2

 

[crutschow]

(2200+1000) = 3200 ,,, 3200/1000 = 3.2

I prefer the usual way G+= 1+ 2.2k/1k = 1+ 2.2 = 3.2

You are correct.

I misread the schematic resistor value.