19_kHz_NOTCH

Published:2009/7/2 21:48:00 Author:May | From:SeekIC

Used in commercial FM transmitters to eliminate 19-kHz program material from stereo encoder. Uses Optical Electronics 9714 opamp in circuit that gives unity passband gain below center frequency, 0.7 gain above center frequency, and Iess than 0.001 gain at notch frequency. Provides adjustments for notch rejection level and Q. R1 is 84K, and R2 is 36K in series with 10K pot.- Precision Notch Filter, Optical Electronics, Tucson, AZ, Application Tip 10255.



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