Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Constant phase shift

  1. Mar 16, 2009 #1

    Is anyone aware of a circuit that could provide a phase shift independent of frequency?
    I have thought of doing it digitally but the number of components needed are ridicules.

    Thank you
  2. jcsd
  3. Mar 16, 2009 #2
    a delay line?
  4. Mar 16, 2009 #3

    The Electrician

    User Avatar
    Gold Member

    What's your purpose?

    How much phase shift? Over what frequency range?
  5. Mar 16, 2009 #4


    User Avatar
    Science Advisor

    ...and do you mean a constant phase shift in terms of number of micro/nano seconds, or a constant phase shift in terms of % of period?
  6. Mar 27, 2009 #5
    A standard audio treble attenuator based on an R C circuit produces a phase shift that is dependent on frequency: 1 radian per neper, or 6.6 degrees per dB. This distorts the sound quality of the audio. How can we eliminate the phase shift?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook