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Phase shift

Ricperes

Jul 20, 2015
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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
 

Arouse1973

Adam
Dec 18, 2013
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5,177
Which way do you want the phase shift lead or lag?
Adam
 

Ricperes

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

Arouse1973

Adam
Dec 18, 2013
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5,177
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
 

Ricperes

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

Ricperes

Jul 20, 2015
29
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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

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
 

Arouse1973

Adam
Dec 18, 2013
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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
 

Ricperes

Jul 20, 2015
29
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Jul 20, 2015
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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!
 

Arouse1973

Adam
Dec 18, 2013
5,177
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The circuit I gave you is for 120º. You can add more RC and buffer stages for greater phase difference.
Adam
 
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