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:
Apr. 19, 2011
Filed:
Aug. 18, 2008
Applicant:
Takao Atsumo, Kanagawa, JP;
Inventor:
Takao Atsumo, Kanagawa, JP;
Assignee:
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/18 (2006.01); H01P 1/15 (2006.01);
U.S. Cl.
CPC ...
Abstract
A switch circuit in which the cut-off characteristic is improved over a wide range of frequencies in the microwave band includes a first field-effect transistor functioning as a switch element, a second field-effect transistor and an inductor. A serially connected circuit composed of the inductor and second field-effect transistor is connected in parallel with the first field-effect transistor across the source and drain thereof. The second field-effect transistor is turned on when the first field-effect transistor operates normally and is turned off when the first field-effect transistor is inspected.