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High-frequency design of sinusoidal oscillators realised with operational amplifiers

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3 Author(s)
J. L. Huertas ; Universidad de Sevilla, Departamento de Electricidad y Electronica, Sevilla, Spain ; A. Rodriguez-Vazquez ; B. Perez-Verdu

The use of slew-rate models for designing RC active oscillators is discussed. It is shown that a precise modelling of the oscillator behaviour is obtained for frequencies beyond the ordinary application range of operational amplifiers. Based on that model, a design procedure is developed, and it is applied in the paper to the design of Wien-bridge oscillators, giving theoretical as well as practical results. Low-distortion oscillations may be obtained up to 100 kHz using standard operational amplifiers.

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IEE Proceedings G - Electronic Circuits and Systems  (Volume:131 ,  Issue: 4 )