Connect with us

Phase shift

Discussion in 'General Electronics Discussion' started by Ricperes, Jul 20, 2015.

  1. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    Hello, I want to make a phase shift but I am not able, I put Vin as one sinudoidal wave, Freq = 50Hz and Amp = 10 V and Vout as having the same wave but offset 120 degrees. So how i can do it? thank you
     
  2. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Which way do you want the phase shift lead or lag?
    Adam
     
  3. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    hello, i just want receive a wave and generate another wave with 120 degrres offset and same amplitude. how? i don't now...
     
  4. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Yes but do you want the new wave to be in front or behind the input? Google lead and lag phase shift for examples of what I mean.
    Adam
     
  5. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    I want the new wave to be in front th input +120º degrees. Can post a exemple please?
     
  6. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Here you go. Waveform 120 degrees apart.
    Thanks
    Adam
    sine120.PNG
     
    hevans1944 and Martaine2005 like this.
  7. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    its exacty this what i want. How i can do it with a circuit?
     
  8. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Give me a moment
    Adam
     
    hevans1944 and Ricperes like this.
  9. Martaine2005

    Martaine2005

    2,437
    648
    May 12, 2015
    You have to CLICK on LIKE....
    He will then post it for you..
     
  10. Martaine2005

    Martaine2005

    2,437
    648
    May 12, 2015
    Lol, and post a £20 note too.
     
  11. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    lol
     
  12. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Thank-you. Here is a simple way to do it. It would be best to make R1, R2 and R4 variable. You may get quite a bit of variation over temperature so choose good quality capacitors and resistors.
    Adam

    120sine.PNG
    120sine_wave.PNG
     
  13. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    Thank you very much , i will test this and after i report!
     
  14. Martaine2005

    Martaine2005

    2,437
    648
    May 12, 2015
    Uh Hah
    You forgot to like!!!!
    And please subscribe too
     
  15. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Remember this is an example, you would be able to use other op-amps, depends what you have lying around. Linear op-amp can be quite expensive.
    Adam
     
    Ricperes and Martaine2005 like this.
  16. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    I have test this circuit, and it's ok! Just another question please, you can give me or say where are the equations to scale the circuit? Like C ou R!

    Thank you again
     
  17. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Phi = tan^-1(XC/R) or Phi = 360*fo*dt. But this will only get you close, you will have to adjust the resistor values to get it right. When I did the calculations the circuit didn't produce the desired phase shift so I had to manually change them to get it right, you will need to adjust the values yourself.
    Adam
     
  18. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    Yes, i understant. I made a test, that is I want to offster another wave 240ºdegrees or -120º degrees, so i use as Vin the Vout of this circuit and it's ok!
     
  19. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    The circuit I gave you is for 120º. You can add more RC and buffer stages for greater phase difference.
    Adam
     
    Ricperes likes this.
  20. Ricperes

    Ricperes

    29
    0
    Jul 20, 2015
    I can substitute LT1006 by which opamp? for exemple?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-