Phase-locked loop with controlled phase slippage

Details Phase-locked loop with controlled phase slippage Phase-locked loop with controlled phase slippage

1991-12-13

1994-03-29

Yusko, Donald J.

Oscillators

Relaxation oscillators

328 63, 328 72, 331 17, H03K 700

Patent

active

052988678

ABSTRACT:
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. 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.

REFERENCES:
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patent: 3789308 (1974-01-01), Lowdenslager
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patent: 4939790 (1990-07-01), Sgrignoli
patent: 4972160 (1990-11-01), Sylvain
patent: 4992744 (1991-02-01), Fujita et al.
Mestha, "Phase-Control Scheme for Synchronous Beam Transfer from the Low Energy Booster to the Medium Energy Boaster"; SSCL-340; Sep. 1991, pp. 1-38.
"Early Instrumentation Projects at the SSC"; D. J. Martin, et al.; SSCL; SSC Report; pp. 109-125; 1990.
L. K. Mestha; "A Controlled Master Frequency Oscillator for the SSC Low Energy Booster"; SSC Report; SSCL; American Institute of Physics; pp. 246-253; 1991.

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