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:
Jul. 11, 1989
Filed:
Nov. 23, 1987
Bunichi Fujita, Kanagawa, JP;
Seiichi Kawashima, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A system for feeding clock signals to a plurality of load units comprises an oscillator for generating a first clock signal having a predetermined frequency, a plurality of signal lines for transmitting a signal representative of the first clock signal to a plurality of load units, and delays assigned to the plurality of signal lines for adjusting phases of the signal transmitted on a corresponding line at connection points between the oscillator and the load unit. Each load unit is responsive to the signal transmitted on a corresponding signal line for producing second clock signals with a frequency n times greater than that of the second clock signals where n is an integer greater than one. Each load unit further is responsive to the second clock signal for generating a plurality of third clock signals which have discrete phases. The plurality of load units are synchronized with at least one of the plurality of third clock signals.