I want to design a Low Pass Bessel Filter with a cutoff of 50MHz. I know how to design a simple active one with op-amps. The signal to be filtered is coming on 50 ohm BNC coax.
My question is how do I handle impedance matching? Can I just take the center conductor on the coax and connect it to a standard Bessel filter input and pass the 'outer' conductor straight through or do I need to do something to impedance match?
Also will op-amp designs be noisy? If anyone has good information on analog filter design methods other than using op-amps I would be very interested. Information on Passive filter design would be interesting as well.
My question is how do I handle impedance matching? Can I just take the center conductor on the coax and connect it to a standard Bessel filter input and pass the 'outer' conductor straight through or do I need to do something to impedance match?
Also will op-amp designs be noisy? If anyone has good information on analog filter design methods other than using op-amps I would be very interested. Information on Passive filter design would be interesting as well.