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regarding opto isolator

Discussion in 'Electronic Basics' started by prav, Feb 12, 2004.

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  1. prav

    prav Guest

    Hi all,

    I was studying some board schematics. In this there are some clocks
    coming from external world . Before these clocks are connected to the
    FPGA pins they pass through an opto isolator.Could any body help me
    out why the opto isolators are really required .

    rgds,
    prav
     
  2. Jamie

    Jamie Guest

    protection,
    and convenience of use over some of the older
    methods for controlling high volt functions with low voltage
    sensitive components.
     
  3. Chaos Master

    Chaos Master Guest

    prav called The Usenet Police (tm) of sci.electronics.basics and said to the cops,
    at 11 Feb 2004 22:04:41 -0800:
    For protection. A little spike can turn the FPGA into toast, and replacing it will
    be not fun (consider a FPGA of 144 pins).
     
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