QUADRATURE_OSCILLATOR_USES_MULTI

Published:2009/7/14 20:48:00 Author:May | From:SeekIC

PLIERS-4214 differential multipliers eliminate need for opamps in quadrature oscillator in which frequency is controlled by external DC voltage. R3, R4, R5, and D1 form diode limiter, while R1，R2，and C1，provide positive feedback to sustain oscillation，R1 should be about equal to R, R2about 20R, and C1 about 10C. R2 can be readjusted for best compromise between distortion and speed of amplitude buildup.-Y. J. Wong, Design a Low Cost, Low-Distortion, Precision Sine-Wave Oscillator, EDN Magazine, Sept. 20, 1978, p 107-113.



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