Accession Number : ADD002115

Title :   Lock Indicator for Phase-Locked Loops.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Whitman,Edward C ; Blake,George B

Report Date : 01 Jul 1975

Pagination or Media Count : 6

Abstract : The patent relates to apparatus for indicating that a phase-locked loop has locked onto a periodic signal using a second auxiliary phase-locked loop to which the incoming signal is fed in parallel with the primary phase locked loop. If the signal is acquired by both, an exclusive OR gate produces a continuous zero output, indicating that a lock-up has occurred.

Descriptors :   *Phase locked systems, *Patents, Indicators, Signals

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE