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:
Jul. 14, 2009
Filed:
Jan. 14, 2005
Applicant:
Naoyuki Miyazawa, Yamanashi, JP;
Inventor:
Naoyuki Miyazawa, Yamanashi, JP;
Assignee:
Eudyna Devices Inc., Yamanashi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A switch that selectively changes radio frequency signals includes at least three FETs, which are connected in series. The source electrodes or drain electrodes arranged at an intermediate stage have a width narrower than that of the source electrodes or the drain electrodes arranged at the initial and final stages. It is thus possible to lower the parasitic capacitance to ground at the intermediate stage and to thereby realize the switch having a high handling power.