I have a 10MHz TTL output OCXO. but I want to multiply it to 50MHz. The PLL multiplication is not good ,as the PFD phase noise is too high.
I think I could use a 50MHz bandpass filter to get sine wave from the square wave. But I don't know how to design the bandpass filter.I mean the input and output impedance.
besides, if I have to amplify the filter output, what amplifier should I use? OP or low noise AP? even could an active filter be used at such high frequency?