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:
Nov. 25, 2008
Filed:
Aug. 16, 2007
Pei-ju Chiu, Wurih Township, Taichung County, TW;
Pei-Ju Chiu, Wurih Township, Taichung County, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
The invention provides an on-chip transformer balun formed among N successive isolating layers. The transformer includes a primary winding and a secondary winding. The primary winding includes a plurality of first semi-turn coils, a plurality of second semi-turn coils, a plurality of metal junctions, and a plurality of first metal bridges. The secondary winding includes a plurality of third semi-turn coils, a plurality of fourth semi-turn coils, and a plurality of second metal bridges. The first semi-turn coils are connected with the second semi-turn coils by the metal junctions and the first metal bridges. The third semi-turn coils are connected with the fourth semi-turn coils by the second metal bridges. By use of the multi-layer first metal bridges, the transformer according to the invention allows a larger input current than a conventional on-chip transformer.