IXQ0 Oscillator question

Discussion in 'General Electronics Chat' started by DumbMonkey, Aug 3, 2007.

  1. DumbMonkey

    Thread Starter New Member

    Aug 3, 2007
    5
    0
    Hi,
    I am designing a circuit using the Intel LXT915 IC which requires a 20Mhz oscillator input on a single pin. I bought an IXQ0 20Mhz chip from C-MAC. The output from this device is not exactly the square wave I was expecting, it has overshoot and is messy. My question is, do I have to add extra circuitry to get a clean square wave clock? The LXT is not working, and I assume that the messy clock wave is causing the problem. Can anyone help?
    Much appreciated,
    DumbMonkey.
     
  2. John Luciani

    Active Member

    Apr 3, 2007
    477
    0
    Are you sure the overshoot wasn't coming from your scope probe?
    Is your scope probe calibrated? Does your scope probe impedance match the
    impedance of your scope?

    Were you using a ground probe wire to make your ground connection?
    You can't use a ground probe wire when making high frequency measurements.
    You need to use coax jacks or rest your probe across test points.

    For some pictures see ---
    http://www.luciani.org/eng-notes/ee-notes/ee-notes-index.html

    (* jcl *)
     
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