Hi guys,

I Have two inverting configuration stages of op-amps, and my input to the first stage is negative voltage, so the output of the second inverting stage is negative.. Would the transfer function of the two inverting configuration stages of op-amps look like this:

Eout= (-R2/R1) (-R3/R4) (-Ein)

note that : -R2/R1 is the gain of the first inverting stage

-R3/R4 is the gain of the second inverting stage

Ein is negative since the input to the first inverting stage is negative....

Does anyone know whether this result correct or not???

Thanks a lot .....

 

Seems right. We are talking DC here aren't we?

 

yeah DC ... I just need to confirm whether it's correct or not as I'm driving the transfer function for my circuit......