CURRENT_CONTROLLED_WlEN

Published:2009/7/5 21:32:00 Author:May | From:SeekIC

Small variations in input voltage to National LM3900 current-mode amplifier change frequency of fourdiode current-controlled Wien bridge over range from 10 to 50,000 Hz, with frequency being proportional to control current. Value of C is 700 pF. Ratio of R2 to sum of R1 and R2 should be greater than 3 to give voltage gain needed.-K. Kraus. Oscillator with Current-Controlled Frequency, Wireless World, Aug, 1974, p 272.



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