90 degrees phase shifter circuit

Thread Starter

rawanayyoub

Joined Oct 9, 2012
8
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
 

kubeek

Joined Sep 20, 2005
5,794
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.
 

Ron H

Joined Apr 14, 2005
7,063
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
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.
 
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