AU2001289877A1 - Synchronizing sample timing in an rfid receiver - Google Patents

Synchronizing sample timing in an rfid receiver

Info

Publication number
AU2001289877A1
AU2001289877A1 AU2001289877A AU8987701A AU2001289877A1 AU 2001289877 A1 AU2001289877 A1 AU 2001289877A1 AU 2001289877 A AU2001289877 A AU 2001289877A AU 8987701 A AU8987701 A AU 8987701A AU 2001289877 A1 AU2001289877 A1 AU 2001289877A1
Authority
AU
Australia
Prior art keywords
signal
phase
sampling
data
reference signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU2001289877A
Inventor
Kevin Scott Buescher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EM Microelectronic Marin SA
Original Assignee
EM Microelectronic Marin SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EM Microelectronic Marin SA filed Critical EM Microelectronic Marin SA
Publication of AU2001289877A1 publication Critical patent/AU2001289877A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Artificial Intelligence (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The tag reader (Fib. 1) of a radio frequency identification system transmits a reference signal (REF) that is modulated and returned to the reader as a data signal (DATA). The reader develops a sampling signal (DLYOUT) for sampling the data signal, the sampling signal being displaced in phase from the reference signal by 2<i>x</i>, where <i>x</i> is the difference in phase between the reference and data signals. This improves detection of the data signal even though the amplitude modulation of the signal may be partly converted to phase modulation because of tolerances or variations in circuit component values. A dual edge phase detector detects (32) the difference in phase between the reference and data signals and produces an offset signal (UPA or DOWNA) having a duration proportional to 2<i>x</i>. The offset signal is used to inject a delay of 2<i>x</i> into a delay locked loop (30) having a phase detector (34) for comparing the phase of the reference signal relative to the sampling signal and a controllable delay circuit (40) for producing the sampling signal from the reference signal. The sampling signal is thus locked to the reference signal with a phase displacement of 2<i>x</i>.
AU2001289877A 2000-09-13 2001-09-12 Synchronizing sample timing in an rfid receiver Abandoned AU2001289877A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US66131100A 2000-09-13 2000-09-13
US09/661,311 2000-09-13
PCT/EP2001/010550 WO2002023465A2 (en) 2000-09-13 2001-09-12 Synchronizing sample timing in an rfid receiver

Publications (1)

Publication Number Publication Date
AU2001289877A1 true AU2001289877A1 (en) 2002-03-26

Family

ID=24653068

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001289877A Abandoned AU2001289877A1 (en) 2000-09-13 2001-09-12 Synchronizing sample timing in an rfid receiver

Country Status (6)

Country Link
EP (1) EP1320829B1 (en)
AT (1) ATE298910T1 (en)
AU (1) AU2001289877A1 (en)
DE (1) DE60111755T2 (en)
TW (1) TW561417B (en)
WO (1) WO2002023465A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501055B8 (en) * 2005-04-07 2007-02-15 Univ Graz Tech METHOD OF DEMODULATING AND READING DEVICE FOR EVALUATING LOAD MODULATED SIGNALS
CN103366143B (en) * 2013-07-03 2016-01-13 清华大学 The method for quickly identifying of label is lost in large-scale radio-frequency identification system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288952A (en) * 1994-04-29 1995-11-01 Hughes Identification Devices High frequency RF identificaton system using low frequency RF/ID chip
WO2000031915A2 (en) * 1998-11-24 2000-06-02 Giga A/S A method and a circuit for retiming a digital data signal

Also Published As

Publication number Publication date
DE60111755D1 (en) 2005-08-04
WO2002023465A3 (en) 2002-10-10
TW561417B (en) 2003-11-11
DE60111755T2 (en) 2006-04-27
EP1320829B1 (en) 2005-06-29
WO2002023465A2 (en) 2002-03-21
ATE298910T1 (en) 2005-07-15
EP1320829A2 (en) 2003-06-25

Similar Documents

Publication Publication Date Title
US20130181818A1 (en) RFID Apparatus
WO2000011592A3 (en) Radio frequency identification system
WO2002005504A1 (en) Method, system and apparatus for initiating and maintaining synchronization of a pulse position modulation (ppm) decoder with a received ppm signal
DE60109166D1 (en) Communication system for detecting interference generated outside the system
WO2006135449A2 (en) Homodyne rfid receiver and method
DE69015668T2 (en) Transmission theft shoplifting detection system.
AU2001289877A1 (en) Synchronizing sample timing in an rfid receiver
US6859640B2 (en) Demodulation capacity of an electromagnetic transponder
US7978073B2 (en) Transmitter and a method for transmitting data
EP1199806A3 (en) PLL circuit and optical communication reception apparatus
JP2009508413A (en) Method and apparatus adapted for demodulation of a data signal
KR950022202A (en) Automatic Frequency Control and Automatic Gain Control of Satellite Communication Earth Station System
KR20060069493A (en) Information processing apparatus, radio communication system, and radio communication method
US8154388B2 (en) Synchronous-phase contactless demodulation method, and associated demodulator and reader
EP1415264B1 (en) Non-contact smart card interrogator, wherein across a transmission line from an antenna to a receiver the signal modulation varies between amplitude modulation and phase modulation
WO2003049275A1 (en) In-phase and quadrature demodulator for rfid system without directional coupler
EP1793355A3 (en) A magnetomechanical electronic article surveillance system and method using side-band detection
WO2002019515A3 (en) Receiver, and method
AU2006202886B2 (en) A Transmitter and a Method for Transmitting Data
Buchanan et al. Simplified, high performance transceiver for phase modulated RFID applications
WO2004029651A1 (en) Method and apparatus for maintaining pseudo-synchronism in rfid tags
EP0939526A3 (en) Carrier recovery for MPSK signals
EP2041692A1 (en) Transceiver device for responder signals
ATE254367T1 (en) METHOD FOR SYNCHRONIZING A CLOCK SIGNAL IN THE RECEIVER OF A TRANSMISSION SYSTEM
TW366663B (en) Sampling time restoration circuit