90 degrees phase shifter circuit

Discussion in 'General Electronics Chat' started by rawanayyoub, Oct 9, 2012.

  1. rawanayyoub

    Thread Starter New Member

    Oct 9, 2012
    Hi, all
    please i asked to build 90 degrees phase shifter circuit of sine wave without using integrator circuit , also i need the amplitude of an input signal does not be changed , please help me , thanks .:D
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    First you need to decide on the frequency you want. Then you need to decide what R and C combination you need to shift introduce a 90° shift. From that you know the attenuation, so you add an amplifier to compensate.
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
    If it is a single frequency, you need a first order all-pass filter. By swapping the positions of R and C, you can get either +90° or -90° phase shift.