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Title: Phase-locked loop with controlled phase slippage

A system for synchronizing a first subsystem controlled by a changing frequency sweeping from a first frequency to a second frequency, with a second subsystem operating at a steady state second frequency is described. Trip plan parameters are calculated in advance to determine the phase relationship between the frequencies of the first subsystem and second subsystem in order to obtain synchronism at the end of the frequency sweep of the first subsystem. During the time in which the frequency of the first subsystem is sweeping from the first frequency to the second frequency, the phase locked system compares the actual phase difference with the trip plan phase difference and incrementally changes the sweep frequency in a manner so that phase lock is achieved when the first subsystem reaches a frequency substantially identical to that of the second subsystem. 10 figures.
Inventors:
Issue Date:
OSTI Identifier:
5074790
Assignee:
Universities Research Association, Inc., Washington, DC (United States) PTO; EDB-94-076789
Patent Number(s):
US 5298867; A
Application Number:
PPN: US 7-807144
Contract Number:
AC35-89ER40486
Resource Relation:
Patent File Date: 13 Dec 1991
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ELECTRONIC EQUIPMENT; SYNCHRONIZATION; FREQUENCY MEASUREMENT; OPERATION; STEADY-STATE CONDITIONS; EQUIPMENT; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)