Low Distortion and State Variable Two-phase Oscillation Circuit

Published:2011/6/14 13:15:00 Author:Michel | Keyword: Low Distortion, State Variable, Two-phase Oscillation Circuit | From:SeekIC

Circuit's Functions The amplifier used in audio equipments needs low distortion signal when it tests.Recently,there are many low distortion OP amplifiers used in audio equipments.If oscillator has distortion, the measurement will be restricted.The state variable circuit has some parts of the active power filter and it can change into oscillators if positive feedback is added.The integrator is composed of two-stage opposite phase amplifier and the high frequency distortion caused by integrator itself reduces 6DB/OCT per stage.This circuit is adopted in low distortion oscillating circuit and if the difference valuefor input and output phase of integrator is 90 degree,it will get 2 phase oscillation output.



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