Accession Number : ADD000090

Title :   Phase Lock Loop with Automatic Step by Step Search Sweep Followed by Linear Search Sweep.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Klein,Ira

Report Date : 04 Dec 1973

Pagination or Media Count : 6

Abstract : The patent describes a phase-locking oscillator loop circuit in conjunction with automatic circuitry for searching for and forcing a phase locked condition with respect to a reference frequency, in which condition the oscillator of the loop operates at a frequency which is a function of first and second input frequencies. The automatic circuitry is characterized by means for step by step searching from a first coarse frequency approximation, with transition to a linear sweep until the lock frequency is achieved. The step by step search automatically reiterates if the desired frequency is passed.

Descriptors :   *Phase locked systems, *Patents, Voltage controlled oscillators, Sweep generators

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE