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:
Oct. 25, 2011
Filed:
Dec. 20, 2005
Applicant:
Hirohito Higashi, Kawasaki, JP;
Inventor:
Hirohito Higashi, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 3/03 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided a voltage controlled ring oscillator having a plurality of ring-connected amplifiers (), and a plurality of variable capacitance elements () being respectively connected to the plurality of amplifiers and having capacitances varied by a voltage control. A plurality of load resistors () and a plurality of tail current sources () are respectively connected to the plurality of amplifiers.