Actually , i dun understand the those circuit operation very well. Can simply explain to me?
The wien bridge is build from 2 RC network, 1 is series and another is parallel. connected to the positive terminal to form a frequency selective feedback network. It also amplifies the signal with the two negative feedback resistors.
The RC phaseshift is a 3 cascaded lead network.Each element of R-C network shifts the phase by 60 degrees. Three such elements shifts the phase by 180degrees.
While the twin-t consist of 3 resistors and 3 capacitors operate by phaseshifting the signals in diff legs and adding them at output.
Anyway , ur respond is much appreciate thank you very much.