Hello. I read the article about the wien bridge oscillator from
http://www.electronics-tutorials.ws/oscillator/wien_bridge.html.
It states that the wien bridge is essentially a band pass filter for that desired frequency fr. But then it states that at that resonant frequency fr, the reactance equals its resistance. Doesnt that mean that there is reactance and therefore phase shift?
and where does that equation for fr = 1/(2piRC) come from? Does it have something to do with the equation for Xc?
Also, I cant understand where that dampening of the signal to third from the original comes from.
Thanks in advance.
http://www.electronics-tutorials.ws/oscillator/wien_bridge.html
http://www.electronics-tutorials.ws/oscillator/wien_bridge.html.
It states that the wien bridge is essentially a band pass filter for that desired frequency fr. But then it states that at that resonant frequency fr, the reactance equals its resistance. Doesnt that mean that there is reactance and therefore phase shift?
and where does that equation for fr = 1/(2piRC) come from? Does it have something to do with the equation for Xc?
Also, I cant understand where that dampening of the signal to third from the original comes from.
Thanks in advance.
http://www.electronics-tutorials.ws/oscillator/wien_bridge.html