I need to create a bandpass filter for a single input to a summing amplifier. In this example of a summing amplifier, I understand how the capacitor and resistor in series creates the low cutoff frequency of \$1/(2\pi RC)\$ for the individual signal. But what is the best way to create an upper cutoff frequency for an individual signal here?
I know a capacitor in parallel with the feedback resistor like this would create an upper cutoff frequency, but that would affect all input signals:
What's the best solution to this?