rompelstilchen
Full Member level 2
hello everyone
I found this schematic
and I want to understand how to calculate resistors for another OpAmp (TL074C)
I can see that the amp is setup as an inverter (and a non inverter at the same time) but I dont understand the use of R7 and R8 ...
if I consider R5 and R7 as a V divider the - input is up to 0V
so how to calc these for another opamp, what is their use ? is it a question of I/O impedance ?
thanks
I found this schematic
and I want to understand how to calculate resistors for another OpAmp (TL074C)
I can see that the amp is setup as an inverter (and a non inverter at the same time) but I dont understand the use of R7 and R8 ...
if I consider R5 and R7 as a V divider the - input is up to 0V
so how to calc these for another opamp, what is their use ? is it a question of I/O impedance ?
thanks
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