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:
Feb. 06, 2001
Filed:
May. 21, 1998
Kouichi Ishimi, Tokyo, JP;
Kazuyuki Ishikawa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A oscillation circuit has a delay loop with a clock delay circuit for generating a delayed clock signal. The clock delay circuit has a selector and has multiple delay elements with delay times differing from each other. The clock delay circuit may produce a time lag which is less than the delay time of any single delay element, the time lag being based on the difference between the time delays of different delay elements. A phase comparator compares the phase of a signal associated the delay loop to that of a reference clock signal, generating a phase difference clock signal. A delay setting circuit can cause the selector to change the selection of one delayed clock signal according to the phase difference signal from the phase comparator in such a manner as to reduce the phase difference.