1000;1_FREQUENCY_SWEEP_

Published:2009/7/6 20:51:00 Author:May | From:SeekIC

Permits varying output frequency of function generator over wide trequency range by using pot to vary control voltage Vc. Network consisting of two transistors and two diodes replaces usual charging resistor of Miller integrator in function generator, and has output cunent varying exponentially with input voltage. Electronic switch using pair of transistors is controlled by Schmitt trigger of function generator, which connects +Vc and -Vc altemately to charging circuit. If frequency pot is mechanically connected to strip-chart recorder, Bode plots of audio equipment can be made over entire audio range.-P.D. Hiscocks, Function Generator Mod. for Wide Sweep Range, Wireless World, Aug. 1973, p 374.



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