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:
Jan. 26, 2010
Filed:
Jan. 26, 2006
Kenichi Hosoya, Tokyo, JP;
Shigeki Wada, Tokyo, JP;
Kenichi Hosoya, Tokyo, JP;
Shigeki Wada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A voltage controlled oscillator of the present invention includes power supply terminal (), control terminal () for controlling an output frequency, output terminals (), cross-coupled transistors (), capacitances (), LC tanks (), resistor (), grounding capacitance () and center frequency control circuit (). Center frequency control circuit () includes resistors (), grounding capacitance (), center frequency control terminal () for controlling a center frequency of the output frequency, and voltage-divider circuit (). Resistors () are connected to the base terminals of cross-coupled transistors (), the other ends of resistors () are connected to each other, and, to this connecting point, one end of grounding capacitance () and one end of voltage-divider circuit () are connected. The other end of voltage-divider circuit () is connected to center frequency control terminal ().