10_Hz_100_kHz_RAMP

Published:2009/7/13 6:14:00 Author:May | From:SeekIC

Uses Miller integrator switched at selected rate by IC comparator in feedback loop. Ramp circuit was developed to drive FETs serving as voltage-dependent resistances in Wien-bridge oscillator of AF sweep generator. Article gives all circuits and construction details. Sweep linearity is better than 15% for all four ranges, covering 10 Hz to 100 kHz. For greatest accuracy, use 40-s sweep time; 4-s sweep is for long-persistence CRT, and 0.1-s sweep can be used only on upper three ranges.-F. H. Trist, Audio Sweep Generator, Wireless World, July 1971, p 335-338.



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