3_1_TRACKING_FILTER

Published:2009/7/2 8:40:00 Author:May | From:SeekIC

Connection shown for Exar XR-215 PLL IC tracks input signal over 3:1 frequency range centered on free,running frequency of VCO. Tracking range is maximum when pin 10 is open. R0 is typically between 1K and 4K.C1 is between 30 and 300 times C0 where timing capacitor C0 depends on center frequency. System can also be operated as linear discriminator or analog frequency meter covering same 3:1 change of input frequency. RF can be 36K.- Phase-Locked Loop Data Book, Exar Integrated Systems, Sunnyvale, GA, 1978, p 21-28.



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