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. 13, 1993
Filed:
Apr. 17, 1991
Takesi Inoue, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A non-contact IC card for receiving electrical power from and exchanging signals with a terminal device without contact has a power consuming circuit which consumes electrical power when the electrical power consumption in the IC card is small. The rate of power consumption by the power consuming circuit is controllable in accordance with the state of the IC card, such as a stand-by state, receiving state, transmitting state, and signal processing state. The power consuming circuit includes a series connection of a switching element and a resistor connected between high-voltage and grounding terminals. The state of the switching element is sequentially controlled by a microcomputer. The control of the power consumption is attained by selecting one of a plurality of the power consuming circuits having different resistance values.