The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1987
Filed:
Mar. 09, 1987
Koichi Tanaka, Kawasaki, JP;
Satoshi Itoh, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
During the receipt of a result of comparison from the phase detector representing that the synchronization signal is phase-delayed behind the input signal, the selection circuit sequentially selects the M number of counters, one by one, in a cyclic fashion, in such a direction as to permit the reference clock input to be phase-advanced correspondingly, so that the frequency-divided output signal from the counter to the phase detector can be sequentially phase advanced by 1/M of one cycle of the reference clock. During the receipt of a result of the comparison indicating that the synchronization signal is phase-advanced ahead of the input signal, on the other hand, the selection circuit sequentially selects the M number of counters, one by one, in a cyclic fashion, in such a direction as to allow the reference clock input to be phase-delayed, so that the frequency divided output signal from the counter to the phase detector can be sequentially phase-delayed by 1/M of one cycle of the reference click. When a phase difference occurs between the input signal and the synchronization signal, one cycle time of the synchronization signal is increased or decreased by 1/M of one cycle of the reference clock, thus assuring an enhanced time resolution.