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:
Oct. 31, 2000
Filed:
Jan. 22, 1998
Jean-Claude Tarbouriech, Ville-la-Grind, FR;
Motorlola, Inc., Schaumburg, IL (US);
Abstract
A portable data carrier, suitable for operation in either a contacted or a contactless mode, includes a clock signal input pad and a clock detection circuit. The clock input pad includes an output that is coupled to a selection circuit having a first input and a second input. An input for the selection circuit is coupled to the output of the clock detection circuit. The microprocessing unit follows the clock being transmitted via the clock input pad in the contacted mode of operation if the clock detection circuit confirms presence of such a clock signal. Otherwise, the contactless mode of operation is chosen, where the microprocessing unit follows a radio frequency clock.