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:
Jun. 21, 2005
Filed:
Sep. 26, 2003
Ki-yeol Kim, Gunpo-shi, KR;
Ki-Yeol Kim, Gunpo-shi, KR;
Abstract
An integrated circuit card includes a circuit for generating a clock signal and restoring data. The circuit includes a receiver for receiving a radio frequency signal having a pause period; a divider for dividing the received signal; a first counter for counting a period of the divided signal at each non-pause period of the received signal; a second counter for counting a period of the divided signal; and a decoder for generating a synchronous clock signal and a decoded data signal in response to outputs of the first and second counters. The circuit can generate a synchronous clock signal and decode a received data signal so as to be compatible with ISO/IEC 14443 Type A protocol, based on the received radio frequency signal transferred from a card reader. The circuit provides an exact decoding result even when the pause period of the received radio frequency varies over a predetermined range.