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:
Feb. 06, 2007
Filed:
Jun. 10, 2004
Tadayoshi Nakatsuka, Callisensvej, DK;
Atsushi Suwa, Takatsuki, JP;
Katsushi Tara, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Four switching circuit sections consisting of four FETs connected in series are provided between a plurality of input/output terminals which output and input a high frequency signal. Gate control voltages are individually applied to gate terminals of four FETs, respectively, so that an on-state and an off-state are achieved. Further drain control voltages are individually applied to drain terminals or source terminals of the FET in each switching circuit section, and a voltage according to an electric power value of the high frequency signal supplied to each of switching circuit sections is supplied as the gate control voltage and the drain control voltage.