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Output From Differential Phase Shifter

Discussion in 'General Electronics Discussion' started by Mira, Aug 18, 2012.

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  1. Mira


    Aug 18, 2012
    Using Multisim, I try to simulate the Differential Audio Phase Shifter circuit from:


    I simulate just a single channel with 10k resistors.

    When running the simulation, Multisim complains about a convergence issue, and wants to automatically solve it. It is able to solve that issue. I have no idea what this convergence issue is about.

    The problem is that the output sine waveform is distorted as shown on one of the attached screenshots.

    If I change all resistors to 1uohm, I get a nice sine waveform at the output (unshifted).

    How can I change this circuit to get a 90 degree phase shift, and proper sine waveforms (with two channels)?

    Attached Files:

  2. Mira


    Aug 18, 2012
    Changing the signal source from AC_POWER to a function generator, and replacing the operational amplifiers from 741 to LM324N fixed both issues.
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