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simulating gate array and extrnl circuitry

Discussion in 'Electronic Design' started by colin, Sep 12, 2007.

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  1. colin

    colin Guest

    ive simulated my PLL in ltspice using basic digital elements,
    results posted in abse
    but I want to put it into a fpga as
    Im using one for other stuff too,
    I have this simulated in xilinx IDE,
    but is there a way of simulating a fpga with a vco atatched ?

    it would be nice to see what frequency it would work upto,
    using the routed part and a circuit for a vco.

    I dont want to divide the 2ghz VCO down more than necessary,
    the charge pump outputs probably wont be able to go much
    more than a few hundred Mhz i gues, but the toggle flops
    might be able to do some of the dividing.

    Colin =^.^=
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