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:
Sep. 04, 2007
Filed:
Jan. 26, 2004
Applicants:
Andreas Sibrai, Krottendorf, AT;
Josef Niederl, Klogenfurt, AT;
Inventors:
Andreas Sibrai, Krottendorf, AT;
Josef Niederl, Klogenfurt, AT;
Assignee:
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/06 (2006.01); H02M 3/18 (2006.01); H01J 19/82 (2006.01);
U.S. Cl.
CPC ...
Abstract
A voltage controlled variable capacitor, formed of a larger number of fixed capacitor segments and a corresponding number of switching elements, linearly switches on each switching element, one after the other. Several techniques are disclosed to have only a minimum number of switching stages being in the active mode-of-change at any one time with a minimum overlap. The arrangement achieves a nearly linear change of capacitance versus tuning voltage change, while resulting in high Q-factor due to the low RDSon and high RDSoff of the fully switched stages.