How to solve this circuit??

Discussion in 'Homework Help' started by pww, Mar 28, 2010.

  1. pww

    Thread Starter New Member

    Feb 5, 2010
    Assume the op amps have saturation voltages of Vsath = 16V and Vsatl = -16V. Obtain the transfer characteristics that related Vout to Vin.

    I recognize the first op amp circuit as a noninverting comparator with hystersis and it has a θ = R1/R2 = 1. So Vx = 16 or -16 and the hystersis window is width 32.

    And the other circuit is a summing inverting amplifier. So then I get Vout = -2*Vin - 2/5*Vx. This is where I think I'm screwing up.

    Please help! Thanks!