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:
Aug. 29, 2006
Filed:
Aug. 27, 2004
Applicant:
Kim Yeow Wong, Renton, WA (US);
Inventor:
Kim Yeow Wong, Renton, WA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03B 19/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A circuit and method for providing a tunable capacitance for a voltage control oscillator (VCO) in which at least one P-N junction varactor and at least one metal oxide semiconductor (MOS) accumulation-mode varactor are effectively coupled and tuned in parallel, thereby providing a net tunable capacitance with which the VCO will realize an optimal combination of quality factor, phase noise, and gain characteristics.