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:
Apr. 23, 2002
Filed:
Dec. 04, 2000
Yutaka Ikeda, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A DLL circuit includes a fine delay circuit including a first inverter circuit, a second inverter circuit and delay units. The first inverter circuit has an output terminal connected to an output terminal of the second inverter and the first and second inverters are configured of inverters of different sizes. A phase comparator compares a delay clock's phase with a reference clock's phase and a result of the phase comparison is referred to to count addresses which are in turn used to selectively drive the inverters configuring the first and second inverter circuits, to allow the fine delay circuit to output a signal having a phase between signals having therebetween a phase difference of a fixed amount. Thus the clock's phase can be adjusted with high precision.