Pulse Narrowing

Discussion in 'The Projects Forum' started by Vulcan27, Apr 9, 2014.

  1. Vulcan27

    Thread Starter New Member

    Apr 9, 2014
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    Hi. I have a TTL data stream of +ve going pulses 64µs wide with a period of 10ms. I need a method of narrowing the pulses to 32µs wide approx without changing the period. Any suggestions please?
     
  2. ericgibbs

    Senior Member

    Jan 29, 2010
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    You could use a 32uS Monostable triggered on the high going edge of the 64uS
    E
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Or if you do not have a 74121, use trailing edge, differentiate with about 10k & 500Pf into a 555?
     
  4. Vulcan27

    Thread Starter New Member

    Apr 9, 2014
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    Thanks. I have lots of 74 series but not the 121, will buy some. Used a 555 and now have 10-64µS variable. Perfect!
     
  5. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    If you are in US, I have 10, 74121's just gathering dust, available for the postage.
     
  6. Vulcan27

    Thread Starter New Member

    Apr 9, 2014
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    Thanks for the kind offer Bernard. I'm in the UK though.
     
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