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:
May. 13, 2014
Filed:
Aug. 05, 2011
Vijay N. Choudhary, Chandler, AZ (US);
Robert Loke, Sunnyvale, CA (US);
Vijay N. Choudhary, Chandler, AZ (US);
Robert Loke, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An electrically tunable inductor with an equivalent inductance includes a main winding and a tuning winding magnetically coupled to the main winding. The current through the tuning winding is controlled to adjust the equivalent inductance of the electrically tunable inductor. A device may include an electrically tunable inductor. A system may include multiple devices, one or more of the devices including an electrically tunable inductor. A tuning controller within the system may control the current in tuning windings of one or more of the multiple devices in the system. When an electrically tunable inductor is part of a resonant circuit, the resonant frequency may be controlled by adjusting the equivalent inductance of the electrically tunable inductor through controlling the current in the tuning winding. Controlling the current in the tuning winding includes one or more of controlling the peak, direction, frequency, duty cycle, or phase of the current.