公开(公告)号：DE69834607D1

公开(公告)日：2006-06-29

申请号：DE69834607

申请日：1998-09-17

Applicant: ST MICROELECTRONICS SA

Inventor： ROBERTS ANDREW ,  SUBBIOTTO FREDERIC ,  DONAT NATHALIE

IPC: G06K19/07 ,  H04B1/59 ,  H04B5/02

Abstract: The detector (24) has a resonant detector circuit (10) formed from an antenna winding and parallel capacitor (C0). The resonant circuit drives a circuit (28 or 30) which detects presence of a radio signal, using the signal from the antenna winding (20). To confirm this detection, a detector (26) senses phase opposition between the voltages at opposite ends of the resonant circuit. Its output is applied to an AND gate along with the outputs from the two detector circuits.

公开(公告)号：DE69834607T2

公开(公告)日：2007-05-03

申请号：DE69834607

申请日：1998-09-17

Applicant: ST MICROELECTRONICS SA

Inventor： ROBERTS ANDREW ,  SUBBIOTTO FREDERIC ,  DONAT NATHALIE

IPC: G06K19/07 ,  H04B1/59 ,  H04B5/02

Abstract: The detector (24) has a resonant detector circuit (10) formed from an antenna winding and parallel capacitor (C0). The resonant circuit drives a circuit (28 or 30) which detects presence of a radio signal, using the signal from the antenna winding (20). To confirm this detection, a detector (26) senses phase opposition between the voltages at opposite ends of the resonant circuit. Its output is applied to an AND gate along with the outputs from the two detector circuits.

公开(公告)号：FR2808634A1

公开(公告)日：2001-11-09

申请号：FR0005802

申请日：2000-05-05

Applicant: ST MICROELECTRONICS SA

Inventor： BARDOUILLET MICHEL ,  DONAT NATHALIE ,  TIWARI VINEET

IPC: G01S13/75 ,  G06K19/07 ,  H04B1/59

Abstract: The electromagnetic transponder has an oscillating circuit to extract the high frequency amplitude modulated signal and a demodulator (17) of the digital words carried. There are separate regulators for the voltage feed and the voltage carrying the digital words (61,70). The digital word voltage has a time constant above that of the voltage feed adjustment.