Hi all-
I am concerned about DC offset in a non-inverting op amp circuit I am working on. In this example, my input resistor (to gnd) is 25k. I was under the (apparently wrong) impression that you could null the DC offset at the input by simply inserting a resistor whose value matches your input resistor in the feedback loop from output to - input, just like we would do if we had a circuit with voltage gain where the input resistor would equal the feedback resistors in parallel. I just simulated the circuit and it was unstable until I removed the feedback resistor.
Is there a way to null this offset at the output without resorting to caps or DC servo circuits?
Thank you in advance for your help!
I am concerned about DC offset in a non-inverting op amp circuit I am working on. In this example, my input resistor (to gnd) is 25k. I was under the (apparently wrong) impression that you could null the DC offset at the input by simply inserting a resistor whose value matches your input resistor in the feedback loop from output to - input, just like we would do if we had a circuit with voltage gain where the input resistor would equal the feedback resistors in parallel. I just simulated the circuit and it was unstable until I removed the feedback resistor.
Is there a way to null this offset at the output without resorting to caps or DC servo circuits?
Thank you in advance for your help!