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:
May. 08, 2007
Filed:
Nov. 07, 2005
Shinichi Yamamoto, Kasugai, JP;
Koji Okada, Kasugai, JP;
Masahiro Tanaka, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention provides a clock generating circuit for generating a spectrum spread clock and carrying out high-speed and accurate phase control of a reference clock signal and an output clock signal, which is composed of compact circuits, and a method for generating the clock. The spectrum spread clock generating circuitis provided with a phase comparator unitthat compares the reference clock signal CLKS with the internal clock signal in terms of a phase difference, and outputs a control current ICin compliance with the result of comparison; a clock generating unitfor generating an output clock signal CLKO; a phase difference signal modulating unitfor outputting a control current IC; and a delay unitfor delaying the output clock in compliance with the control current ICand outputting the internal clock signal CLKN.