- #1
likephysics
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Homework Statement
This is not a homework problem. But I still need answers/help.
I need help analyzing this phase shifting ckt.
Basically, its a sine wave fed to one end of a Resistor and an inverted sine wave (180 deg) fed to one end of a capacitor.
The other 2 ends of capacitor and resistor are tied together.
As you vary the resistance of the resistor, the phase of the resulting output at the intersection of R & C shifts with respect to the input.
I don't understand how this ckt works. I have no clue how to start analyzing this.
I thought the voltage at R and the capacitor voltage (which lags by 90 deg) add together.
But after simulating I found that's not the case.
In the attached ckt, the 2 opamps feed the sine wave to R and C.