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:
Feb. 17, 2015
Filed:
Nov. 29, 2011
Michel Thill, Meudon, FR;
François-xavier Marseille, Meudon, FR;
Michel Thill, Meudon, FR;
François-Xavier Marseille, Meudon, FR;
Gemalto SA, Meudon, FR;
Abstract
The invention relates to a smartcard () comprising: —a microcontroller (); —a contact communication interface (); —a supply line (Vcc) connecting the contact communication interface to the microcontroller, a clock line (Clk) connecting the contact communication interface to the microcontroller. The smartcard further comprises a power management circuit () including a switch () adapted to selectively open or close the supply line connection between the contact communication interface and the microcontroller, the power management circuit being adapted to detect the loss of a clock signal on the clock line (Clk), adapted to keep said switch closed during a predetermined period after a loss of clock signal is detected and adapted to open said switch after said predetermined period.