cant find this circuit

Discussion in 'Analog & Mixed-Signal Design' started by pager48, Apr 3, 2019.

  1. pager48

    Thread Starter Member

    Nov 25, 2018
    160
    3
    looking for a analog circuit which takes this kind of output for the shown input.

    maybe it has a name I was thinking one shot or something but that didnt bring anything like this up
     
  2. MrChips

    Moderator

    Oct 2, 2009
    19,051
    6,121
    One circuit solution is called a monostable multivibrator and also known as a "one-shot".
    There are many varieties available.

    What is the voltage level and pulse width?
     
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  3. MrChips

    Moderator

    Oct 2, 2009
    19,051
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    You can cascade two monostables.
    The first monostable sets the delay. The second sets the pulse width.
     
  4. AnalogKid

    AAC Fanatic!

    Aug 1, 2013
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    With the 555, there is a trick you can use to get both the input delay and the output pulse with one device. However, the input signal must be negative-going (unlike your drawing).

    An alternative is to grow the monostable using a CMOS logic chip. The CD4093 can do both the delay and output stages in one part. However, the output can source/sink only a few mA (unlike the 555, which cah source/sink 200 mA).

    What is the input signal coming from, and what does the output signal go to? If the input is in fact a power source being switched on, there is another 555 trick that will work.

    ak
     
    Last edited: Apr 3, 2019
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  5. MrChips

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    Is it too much to ask what is this IC from which the signal comes?
     
  6. AnalogKid

    AAC Fanatic!

    Aug 1, 2013
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    The phasing is not a significant circuit problem.
    Is this important? You still have not said what the output of the circuit is driving, its voltage and current requirements, etc.

    ak
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    If it is for a circuit design using 4000 series CMOS ICs, you can use a CD4098 dual monostable multivibrator.
     
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