Accession Number : ADD009129

Title :   Microprocessor Controlled Phase Locked Loops.

Descriptive Note : Patent Application,


Personal Author(s) : Light,David O , Jr ; Hayes,Frank , III ; McGinty,Joseph R

Report Date : 09 Dec 1981

Pagination or Media Count : 14

Abstract : A digital counter is phased locked to a reference frequency by a voltage control oscillator which causes the counter to increase its count rate or decrease its count rate in accordance to the presence of a one or a zero on the most significant bit of the counter at the halfway point of one cycle of the reference frequency. The counter is reset at the end of the cycle of the reference frequency. A single microprocessor which can assess this most significant bit (MSB) and vary the oscillator output, can in this manner control any number of independent phase lock loop circuits. (Author)

Descriptors :   *Patent applications, *Phase locked systems, *Microprocessors, Counters, Digital systems, Voltage controlled oscillators, Circuit analysis, Schematic diagrams, Input, Analog to digital converters, Microsecond time

Subject Categories : Electrical and Electronic Equipment
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE