### Phase shift oscillator equations way different in other book

Posted:

**Wed Jan 24, 2007 3:10 pm**Hi I am a electronics technician that came across equation confusion from various books for the three network phase shift oscillator circuit.One book"hints and kinks by QST"says f=(tan 60 deg)/2prc=1.73/6,28 rc=

0.28/rc. Another book "electricity,electronics and electromagnetic principles" by Robert Boylestad says: fo=1/(2xpi x square root of 6 x rc) =1/(2xpi x tan 180deg xrc);and the last book "Introduction To electronic Circuit Design" by Richard Spencer says : f=(square root of 6 /rc)/(2 x pi).

Which equation will give the correct answer? I think it's Boylestads book but when I rearrange the equation to solve for c I get :

c = 25330/fo^2 6r . I would really like to know the correct answer. I will build the circuit as in the Hints And Kinks Book and make measurements to see if their correct or not. Tim Rasch [email protected]

0.28/rc. Another book "electricity,electronics and electromagnetic principles" by Robert Boylestad says: fo=1/(2xpi x square root of 6 x rc) =1/(2xpi x tan 180deg xrc);and the last book "Introduction To electronic Circuit Design" by Richard Spencer says : f=(square root of 6 /rc)/(2 x pi).

Which equation will give the correct answer? I think it's Boylestads book but when I rearrange the equation to solve for c I get :

c = 25330/fo^2 6r . I would really like to know the correct answer. I will build the circuit as in the Hints And Kinks Book and make measurements to see if their correct or not. Tim Rasch [email protected]