pulse

Discussion in 'General Electronics Chat' started by theertham, Apr 28, 2012.

  1. theertham

    Thread Starter New Member

    Apr 28, 2012
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    hi
    i want to generate a 10 microsecond on pulse.can anybody suggest which op amp i have to use
     
  2. strantor

    AAC Fanatic!

    Oct 3, 2010
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    I don't know much, but I know opamps don't create pulses. I think you need some kind of 555 circuit, but I can't help you there.
     
  3. kelvin_mksinst

    New Member

    Apr 28, 2012
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    you can google "monostable multivibrator" & "74121". What you are looking for seems to be one-shot pulse generator. It can be implemented by 74121.
     
  4. theertham

    Thread Starter New Member

    Apr 28, 2012
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    yes..i am using an astable multivibrator to trigger to a monostable multivibrator.i need to generate a 10 microsecond pulse.but when i used 741
    output is distorted.i heard 741 have limitation since it is a high frequency application.so can you suggest any op amp which has same pinout as741 but in high frequency
     
  5. #12

    Expert

    Nov 30, 2010
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    The thread right under this one has the answers. It's marked, "help" which explains why useless labels like that are discouraged.
     
  6. MrChips

    Moderator

    Oct 2, 2009
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    Why do you even need an op-amp? The 74121 or 74123 would give you a pulse output.
     
  7. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    What will be the load and output voltage and pulse width stability/precision?

    Single pulse or astable multivibrator? If astable then which frequency/duty cycle?
    If monostable then how is it triggered?

    A 555 will do whatever you need.
     
  8. #12

    Expert

    Nov 30, 2010
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    I've made a 10% duty cycle oscillator with an opamp, but not at this speed. If that will do what you want, there are rather fast opamps, but they aren't called 741. You need to be in the megahertz range to get a 10usec pulse.

    Somebody else posted LMR348DR fom Digikey as able to go that fast.
     
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