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:
Jul. 07, 1992
Filed:
Oct. 31, 1990
Eric Diehl, Neudorf, FR;
Joel Hamon, Lipsheim, FR;
Abstract
Reader for smart cards comprising a supply for the circuits of the card, a means of controlling information exchanges between the card and the reader and an input for digital signals from a pay-television system. The means of control comprises a first microcontroller which receives the digital signals and which controls a second microcontroller which itself controls the exchange of information with the card and delivers power supply control signals as a function of the information received from the card. The outputs from the first microcontroller are at a fixed potential during the resets and the outputs from the second microcontroller are at a floating potential during the resets. A port enables the first microcontroller to control the power supply during the resets.