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:
Aug. 20, 2002
Filed:
Feb. 02, 2001
Shigehiro Kuge, Hyogo, JP;
Takeshi Hamamoto, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A DLL circuit includes a delay circuit for producing an output clock signal by delaying an input clock signal, and a phase comparator circuit for making a comparison between phases of the output and input clock signals. The delay circuit includes a plurality of delay units each having a unit delay amount changing in accordance with a drive potential level. The DLL circuit further includes a delay control circuit for controlling activation of the delay units in accordance with the result of phase comparison of the phase comparator circuit, and a drive potential control circuit for controlling the drive potential in accordance with the result of phase comparison of the phase comparator circuit.