Weinbridge Oscillator

 
  • AMPLIFIER
  • OSCILLATOR
  • PARALLEL
  • PHASE
  • FREQUENCY
  • WEINBRIDGE
  • BAND PASS
  • DC SOURCE
  • VOLTMETER
  • OPAMP
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Overview

The Weinbridge oscillator is an oscillator made up of RC network to produce sinusoidal oscillations. The RC network is made up of a series RC network annd parallel RC network. This is basicallly a band-pass network which has zero phase at a certain resonant frequency. Also the voltage gain of the amplifier circuit MUST be equal to three "Gain = 3" for oscillations to start. The output of the operational amplifier is fed back to both the inputs of the amplifier. One part of the feedback signal is connected to the inverting input terminal.  The other part is fed back to the non-inverting input terminal (positive feedback) via the RC Wien Bridge network. The frequency of oscillation is given by f = 1/(2*pi*R*C)

Circuit info

Author

Created on: 21 Feb 2013
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