FREQUENCY_DOUBLED_OUTPUT

Published:2009/7/15 3:05:00 Author:Jessie | From:SeekIC

Current-controlled oscillator section of Exar XR-567 tone decoder is connected to double frequency of square-wave output by feeding portion of output at pin 5 back to input at pin 3 through resistor. Quadrature detector of IC then functions as frequency doubler to give twice output frequency at pin 8. Supply voltage range is 5-9 V.- Phase-Locked Loop Data Book, Exar Integrated Systems, Sunnyvale, CA, 1978, p 41-48.



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