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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.:

US 9812251 B1

PDFFull Text
Date of Patent:
Nov. 07, 2017

Filed:

Oct. 12, 2016

Varainductor and operation method thereof based on mutual capacitance

Applicant:

Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu, TW;

Inventors:

Yi-Hsuan Liu, Hualien, TW;

Hsieh-Hung Hsieh, Taipei, TW;

Chewn-Pu Jou, Hsinchu, TW;

Fu-Lung Hsueh, Kaohsiung, TW;

Assignee:

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu, TW;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

Ryan Jager

Int. Cl.
CPC ...
H03L 7/06 (2006.01); H01F 27/42 (2006.01); H01F 21/12 (2006.01); H01F 27/28 (2006.01); H01F 27/40 (2006.01); H03B 5/12 (2006.01); H03L 7/099 (2006.01); H01F 29/02 (2006.01); H01L 23/522 (2006.01); H01L 23/528 (2006.01); H01L 23/58 (2006.01); H01L 27/06 (2006.01);
U.S. Cl.
CPC ...
H01F 27/42 (2013.01); H01F 21/12 (2013.01); H01F 27/2804 (2013.01); H01F 27/40 (2013.01); H01F 29/02 (2013.01); H01L 23/528 (2013.01); H01L 23/5226 (2013.01); H01L 23/5227 (2013.01); H01L 23/585 (2013.01); H01L 27/0688 (2013.01); H03B 5/1212 (2013.01); H03B 5/1228 (2013.01); H03B 5/1256 (2013.01); H03L 7/099 (2013.01); H01F 2021/125 (2013.01); H03B 2201/0216 (2013.01);
Abstract

A varainductor includes a spiral inductor, a ground ring, and a floating ring. The floating ring is disposed between the ground ring and the spiral inductor and surrounds a ring portion of the spiral inductor. A switching element, controlled by a switch control signal, selectively electrically connects the ground ring to the floating ring. The switching element includes one or more switches. The one or more switches are controlled by one or more signals of the switch control signal to adjust the inductance level of the varainductor.

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