Design of a 2 phase pulse width modulator

Discussion in 'The Projects Forum' started by fantabulous68, May 18, 2010.

  1. fantabulous68

    Thread Starter Active Member

    Nov 3, 2007
    51
    4
    SPECIFICATIONS:

    *PWM OUTPUT VOLTAGE OV (OFF) OR 5V (ON) WITH A MAX CURRENT CAPABILITY OF 0.1ma
    *A constant pulse frequency of 100KHz(each phase is 50KHz)
    *Accepts an input voltage of -5V.....+5V to create a duty cycle range D=0.0 to D=1.0


    I want to know if i designed the components of the triangle wave generator correctly ie. R1, R2, R3 and the capacitor
    (see diagram)


    R1 & R2 will have the same current right?
    therefore

    choose R1=20K & R2=10K

    so current in R1 & R2= 500uA


    to solve the capacitor

    each phase is 50KHz therefore Ton=20uS

     
  2. fantabulous68

    Thread Starter Active Member

    Nov 3, 2007
    51
    4
    Somebody please help...
     
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