Maker Pro
Maker Pro

Phase shift

Ricperes

Jul 20, 2015
29
Joined
Jul 20, 2015
Messages
29
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
5,178
Joined
Dec 18, 2013
Messages
5,178
Which way do you want the phase shift lead or lag?
Adam
 

Ricperes

Jul 20, 2015
29
Joined
Jul 20, 2015
Messages
29
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
5,178
Joined
Dec 18, 2013
Messages
5,178
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
Joined
Jul 20, 2015
Messages
29
I want the new wave to be in front th input +120º degrees. Can post a exemple please?
 

Ricperes

Jul 20, 2015
29
Joined
Jul 20, 2015
Messages
29
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
5,178
Joined
Dec 18, 2013
Messages
5,178
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
Joined
Jul 20, 2015
Messages
29
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
5,178
Joined
Dec 18, 2013
Messages
5,178
The circuit I gave you is for 120º. You can add more RC and buffer stages for greater phase difference.
Adam
 
Top