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:
Jul. 07, 2009
Filed:
Sep. 28, 2007
Applicant:
Seiichi Ito, Minato-ku, JP;
Inventor:
Seiichi Ito, Minato-ku, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/02 (2006.01); H03B 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
An object of the present invention is to provide a voltage controlled oscillator in a microwave band without narrowing the variable frequency range and having improved phase noise characteristics. This invention is a voltage controlled oscillator in the microwave band which controls an oscillation frequency by a varactor diode, a varactor diode circuit in which a plurality of series-connected circuits having the varactor diode and a capacitance connected in series are connected in parallel and the varactor diodes include at least one or more GaAs varactor diodes of the HyperAbrupt type and at least one or more Si varactor diodes of the Abrupt type.