Positive Pulse Pulse Stretcher

  
A simple pulse stretcher built with two sections of an op amp uses voltage follower U1A to drive Dl and C2.
Positive Pulse Pulse Stretcher - schematic

C2 charges to the peak value of pulse voltage. R3 and R4 determine the discharge time of C2 and therefore the pulse stretching. U1B acts as a voltage follower. Typically this circuit can stretch a pulse by a factor of 50. C2 can be charged to accommodate different pulse rates.




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