what would be the use of a small (pF range) capacitor parallel to R4?
Sep 26, 2022 at 4:56 AM Thread Starter Post #1 of 3

mrjayviper

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I was looking at various opamp circuits and came across a small capacitor in parallel to the "input" resistor (R4). What would be its purpose? Thanks
opamp.jpg
 
Oct 18, 2022 at 11:03 AM Post #2 of 3
Did I miss the "in-parallel" capacitor in your diagram?

Most of the time a parallel capacity to a resistor changes the phase angle of the current and voltage across that component. This helps the current lead or lag the voltage.
 

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