- #1

- 23

- 0

## Main Question or Discussion Point

My understanding is that the capacitance of a typical transmission line will increase proportionally to it's length. So in the case of a simple passive LPF circuit, consisting of just the LPF and the transmission line to the load (of infinite impedance), this would in turn mean the cut-off frequency would decrease as the line gets longer.

My question is this : what kind of op-amp could be best used to negate this effect so that the cut-off frequency would be independent of the length of the transmission lines capacitance?

*EDIT I'm guessing a voltage follower? Although not quite sure exactly how they work tbh...

My question is this : what kind of op-amp could be best used to negate this effect so that the cut-off frequency would be independent of the length of the transmission lines capacitance?

*EDIT I'm guessing a voltage follower? Although not quite sure exactly how they work tbh...

Last edited: