The present invention relates to a contactless integrated circuit reader operating by inductive coupling, comprising an antenna circuit for sending an alternating magnetic field, circuits for applying an alternating excitation signal to the antenna circuit and circuits for modulating the amplitude of...http://www.google.es/patents/US20030169152?utm_source=gb-gplus-sharePatente US20030169152 - Contactless integrated circuit reader
Número de solicitud: 10/411,008 Número de publicación: US 2003/0169152 A1 Fecha de presentación: 10 Abr 2003 Patente emitida: US7098770 ( Fecha de emisión 29 Ago 2006)
