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:
Mar. 10, 2009
Filed:
Sep. 30, 2005
Applicant:
Ligang Zhang, Austin, TX (US);
Inventor:
Ligang Zhang, Austin, TX (US);
Assignee:
Silicon Laboratories Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 5/00 (2006.01); H01L 23/552 (2006.01);
U.S. Cl.
CPC ...
Abstract
An oscillator circuit formed at least partially on an integrated circuit substrate includes a self-shielding inductor. The self-shielding inductor has a toroidal structure. A coil forms a structure that is symmetric around an axis orthogonal to a surface of the integrated circuit substrate. A magnetic filed generated by the self-shielding inductor is confined to a core region of the coil. Portions of the self-shielding inductor may be formed in integrated circuit layers, redistribution layers, package layers, through-substrate interconnect, backside substrate conductor layers, or combinations thereof.