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how to get a 50MHz low phase noise clock from a 10MHz TTL square wave OCXO?

Question asked by fenfei on Dec 4, 2010
Latest reply on Dec 7, 2010 by Georgy

    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?