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:
Dec. 07, 1999
Filed:
Aug. 26, 1996
Robert Reiner, Unterhaching, DE;
Gerhard Schraud, Mering, DE;
Walter Strubel, Seefeld, DE;
Heiko Fibranz, Munchen, DE;
Joachim Weitzel, Markt Indersdorf, DE;
Dominik Berger, Graz, AT;
Wolfgang Eber, Graz, AT;
Gerald Holweg, Graz, AT;
Siemens Aktiengesellschaft, Munich, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A chip card includes a semiconductor chip that contains at least one memory. In order to supply energy to the chip and to provide for bi-directional data transmission from and to the chip, both contacts and a device for contactless data transmission are provided. A triggerable switch device which is provided on the chip connects the memory either to the contacts or to the device for contactless data transmission as a function of a state of an output signal of a logic circuit connected to at least a voltage supply contact. The switch device assumes a position of repose when it is not triggered and in that position it connects the memory to the device for contactless data transmission, while only upon application of a voltage to the supply voltage contact, triggered by the logic circuit, does it connect the contacts to the memory.