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1_MHz_TRACKING_FILTER

2017-02-13 13:07  
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1_MHz_TRACKING_FILTER
Exar XR-S200 PLLIC is connected to function as frequency filter when phase-locked loop locks on input signal, to produce filtered version of input signal frequency at VCO output. Because circuit can track input over 3:1 range of frequencies around freerunning frequency of VCO, it is known as tracking filter. Optional wideband discriminator output is also provided.- Phase-Locked Loop Data Book, Exar Integrated Systems, Sunnyvale,CA,1978, p 9-16.