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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.:

US 7554383 B1

PDFFull Text
Date of Patent:
Jun. 30, 2009

Filed:

Mar. 04, 2002

Chip for non-contact reader/writer having power-supply management function

Applicants:

Shigeru Arisawa, Tokyo, JP;

Akihiko Yamagata, Kanagawa, JP;

Inventors:

Shigeru Arisawa, Tokyo, JP;

Akihiko Yamagata, Kanagawa, JP;

Assignee:

Sony Corporation, , JP;

Attorney:

Lerner, David, Littenberg, Krumholz & Mentlik, LLP

Primary Examiner:

Long Nguyen

Int. Cl.
CPC ...
G11C 5/14 (2006.01);
U.S. Cl.
CPC ...
Abstract

The present invention relates to a semiconductor integrated-circuit device capable of seamlessly switching a power source obtained by rectifying a carrier wave and an external power source. The semiconductor integrated-circuit device having a non-contact card function and a non-contact reader/writer function includes a rectifierfor rectifying a received carrier wave, a serial regulatorfor obtaining a predetermined voltage from an output voltage of the rectifierand a power-supply control circuitfor turning on/off the voltage from a batteryIn a case where the output voltage of the batteryis equal to or higher than a predetermined voltage, the power-supply control circuitselects the voltage of the batteryas power required for operation of an ICwhen a reader/writer mode signal or a card mode signal is received. On the other hand, when the output voltage of the batteryis lower than the predetermined voltage, the power-supply control circuitselects the output voltage from the rectifieras power required for operation of the ICThe present invention can be applied to a portable terminal, such as a cellular phone.

Find Patent Forward Citations

Arisawa, Shigeru. (2009). Chip for non-contact reader/writer having power-supply management function (U.S. Patent No. 7554383). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7554383

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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