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CAT NO: DIDACTICNLE-Export-117016
Transistorised Wein Bridge Oscillator For Electrical Lab Training.
Positive feedback in Wein-Bridge Oscillator is to
use two stage RC coupled Amplifier. Since first stage of the RC-Coupled
amplifier introduces a phase shift of 180 degree. Second stage
introduces phase shift of 360 degree. Positive feedback network makes
the input Vin and output Vout in the same phase. The frequency of
oscillator.
In addition to the positive feedback the circuit is also
provided with negative feedback to make the oscillations stable. Observe
the output waveform on CRO. By varying the resistor R1 the frequency
will change.
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