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:
Jan. 19, 2010
Filed:
Aug. 29, 2006
Toshihiro Miura, Tokyo, JP;
Hitoshi Akamine, Tokyo, JP;
Yasushi Shigeno, Tokyo, JP;
Akishige Nakajima, Tokyo, JP;
Masahiro Tsuchiya, Tokyo, JP;
Toshihiro Miura, Tokyo, JP;
Hitoshi Akamine, Tokyo, JP;
Yasushi Shigeno, Tokyo, JP;
Akishige Nakajima, Tokyo, JP;
Masahiro Tsuchiya, Tokyo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
Switching characteristics in an SPDT switch are improved to reduce the rise delay in a low power slot following after a high power slot. Control terminals of an SPDT switch are respectively provided with backflow prevention circuits. The backflow prevention circuit is configured to have two transistors and a diode. In a transmission mode, for example, when a time slot where a high power passes through transistors is followed by a time slot where a low power passes through, the electric charges accumulated in the gates of the transistors are blocked. In the case where the transistors are in the OFF state, the electric charges accumulated in the gates of the transistors are immediately discharged to allow the transistors to be completely turned OFF.