Need VCO for 14 MHz PLL

Need to generate in phase and quadrature digital signals, locked to
laser detector output at ~ 3.6 MHz (quite stable). Need reasonably high
precision 90deg shift and 50% duty fator +/- a percent or so. Thought
of building 4X multiplying PLL, followed by 2 bit quadrature divider.
So, looking for VCO that will run at 14.4 MHz.

Seem to find lots of chips for cell phone and other VHF/UHF/uWave apps,
and old standbys from 556 and 4046 family, but nothing that would work
at 14.4 MHz. Suppose I could make a Colpitts or Hartley circuit using
varactor diode for variable capacitance, but, hoping there is a chip
that will do this. Checked Maxim, National, Motorola, Linear
Technologies, Burr Brown, with no joy. Any other suggestions?

Thanks
W Letendre

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Relevant Pages

  • Re: Need VCO for 14 MHz PLL
    ... > Need to generate in phase and quadrature digital signals, ... > of building 4X multiplying PLL, followed by 2 bit quadrature divider. ... > Seem to find lots of chips for cell phone and other VHF/UHF/uWave apps, ...
    (sci.electronics.design)
  • Re: Need VCO for 14 MHz PLL
    ... >Need to generate in phase and quadrature digital signals, ... looking for VCO that will run at 14.4 MHz. ... >Seem to find lots of chips for cell phone and other VHF/UHF/uWave apps, ... Professional Circuit Designer ...
    (sci.electronics.design)