22-10-2012, 12:03 PM
RC Phase shift Oscillator
RC phase shift Oscillator.docx (Size: 19.24 KB / Downloads: 28)
Theory:
It is a low frequency Oscillator, used to generate oscillations in the audio frequency range the feedback network consists of three Identical RC sections. The values of R and C are selected such that each RC section gives a phase shift of 60 degrees at the oscillator frequency. The total phase shift from three RC sections will be 180degree.The CE stage introduces a phase shift of 180degree.The condition for sustained oscillations is hfe > 4k+23+29/k.
RC phase shift Oscillator.docx (Size: 19.24 KB / Downloads: 28)
Theory:
It is a low frequency Oscillator, used to generate oscillations in the audio frequency range the feedback network consists of three Identical RC sections. The values of R and C are selected such that each RC section gives a phase shift of 60 degrees at the oscillator frequency. The total phase shift from three RC sections will be 180degree.The CE stage introduces a phase shift of 180degree.The condition for sustained oscillations is hfe > 4k+23+29/k.