Accession Number : ADD002904
Title : Tracking Status Detector for a Digital Delay Lock Loop.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Chen,Chang Chwng ; Holmes,Jack K ; Lewis,James L
Report Date : 01 Jun 1976
Pagination or Media Count : 7
Abstract : An unlocked detector for a digital delay lock loop employs an up-down counter which periodically accumulates the algebraic sum of the quantized positive and negative adjustments made at a preselected rate by the incremental phase modulator. Whenever this sum reaches a specified threshold value corresponding to a particular phase error, an unlocked indication is given. Arrangements using the same principle are disclosed for analog loops.
Descriptors : *Phase locked systems, *Patents, Detectors, Tracking, Monitors, Phase locked communications, Digital systems, Analog systems
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE