saw tooth!!!

Discussion in 'Homework Help' started by reymund, Sep 29, 2008.

  1. reymund

    Thread Starter Member

    Sep 23, 2008
    23
    0
    good day guys i just wanna ask on how to generate saw tooth waveform using a 555 timer circuit? with an input from a multivibrator from cascaded 555 timer citcuits....

    can you post here the your circuits ty...
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    The datasheet of a 555 shows a linear ramp circuit. It can makw a sawtooth generator circuit. It uses a constant current source transistor to slowly charge the capacitor then the 555 quickly discharges it.
     
  3. reymund

    Thread Starter Member

    Sep 23, 2008
    23
    0
    sir Audioguru do you have any ciruits pre-designed with regards to this issue?...

    before i try to input an astable type of configuration on a differentiator type of op-amp to create a ramp output but the outcome still on the "on-off" condition. why is that sir??..
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    As Audioguru noted, the pre-designed circuit is presented in the data sheet.

    Regarding your differentiator, you will have to share your schematic and your input signal (including skew rates). Note well that the differentiator will not create a sawtooth output from a square wave in - you need an integrator for that trick.
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
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