WO2014008569A3 - Circuito detector de sinal de radiofrequencia para etiquetas rfid semi-passivas - Google Patents

Circuito detector de sinal de radiofrequencia para etiquetas rfid semi-passivas Download PDF

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Publication number
WO2014008569A3
WO2014008569A3 PCT/BR2013/000417 BR2013000417W WO2014008569A3 WO 2014008569 A3 WO2014008569 A3 WO 2014008569A3 BR 2013000417 W BR2013000417 W BR 2013000417W WO 2014008569 A3 WO2014008569 A3 WO 2014008569A3
Authority
WO
WIPO (PCT)
Prior art keywords
radio
frequency signal
semi
rfid tags
passive rfid
Prior art date
Application number
PCT/BR2013/000417
Other languages
English (en)
French (fr)
Other versions
WO2014008569A2 (pt
Inventor
Egas HENES NETO
Laurent COURCELLE
Rafael SANTIAGO CANTALICE
Original Assignee
Centro Nacional De Tecnologia Eletrônica Avançada - Ceitec S.A
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 Centro Nacional De Tecnologia Eletrônica Avançada - Ceitec S.A filed Critical Centro Nacional De Tecnologia Eletrônica Avançada - Ceitec S.A
Publication of WO2014008569A2 publication Critical patent/WO2014008569A2/pt
Publication of WO2014008569A3 publication Critical patent/WO2014008569A3/pt

Links

Classifications

    • 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
    • G06K19/0701—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 at least one of the integrated circuit chips comprising an arrangement for power management
    • G06K19/0702—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 at least one of the integrated circuit chips comprising an arrangement for power management the arrangement including a battery

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Circuits Of Receivers In General (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Circuito detector de sinal de radiofrequência para etiquetas rfid semi-passivas que detecta a presença de um sinal de radiofrequência emitido pelo leitor. O circuito tem aplicações em etiquetas RFID semi-passivas, ou seja, circuitos que são desativados na ausência de sinal de radiofrequência e ativados para realizarem comunicação com o leitor quando um sinal de radiofrequência é detectado. O circuito é composto de dois detectores de envoltória, um dos detectores detecta a envoltória superior e outro detecta a envoltória inferior. As envoltórias superior e inferior são comparadas através de um circuito comparador que possui um limiar de sensibilidade, de modo que sempre que houver diferença entre as envoltórias superior e inferior maior que limiar de sensibilidade do comparador, o sinal de radiofrequência é detectado.
PCT/BR2013/000417 2012-07-13 2013-07-04 Circuito detector de sinal de radiofrequencia para etiquetas rfid semi-passivas WO2014008569A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR1020120173581 2012-07-13
BR102012017358-1A BR102012017358B1 (pt) 2012-07-13 2012-07-13 circuito detector de sinal de radiofrequência para etiquetas rfid semi-passivas e método para detectar um sinal de radiofrequência para etiquetas rfid semi-passivas

Publications (2)

Publication Number Publication Date
WO2014008569A2 WO2014008569A2 (pt) 2014-01-16
WO2014008569A3 true WO2014008569A3 (pt) 2014-03-20

Family

ID=49916599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2013/000417 WO2014008569A2 (pt) 2012-07-13 2013-07-04 Circuito detector de sinal de radiofrequencia para etiquetas rfid semi-passivas

Country Status (2)

Country Link
BR (1) BR102012017358B1 (pt)
WO (1) WO2014008569A2 (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105376004A (zh) * 2014-07-31 2016-03-02 展讯通信（上海）有限公司 一种自适应搜台装置及方法以及调频收音机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060238301A1 (en) * 2005-02-22 2006-10-26 Jiangfeng Wu Multi-protocol radio frequency identification transponder tranceiver
US7405659B1 (en) * 2004-03-31 2008-07-29 Impinj, Inc. RFID tag switched capacitor slicer threshold
US7439781B2 (en) * 2005-07-28 2008-10-21 Fujitsu Limited Power detection circuit for non-contact IC card or RFID tag
US7579906B2 (en) * 2004-11-12 2009-08-25 National Semiconductor Corporation System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags
CN101666833B (zh) * 2009-09-28 2012-08-15 王树甫 Cmos差分射频信号幅度检测电路
US8542777B2 (en) * 2010-01-07 2013-09-24 Mstar Semiconductor, Inc. Amplitude modulation demodulating circuit and method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7405659B1 (en) * 2004-03-31 2008-07-29 Impinj, Inc. RFID tag switched capacitor slicer threshold
US7579906B2 (en) * 2004-11-12 2009-08-25 National Semiconductor Corporation System and method for providing a low power low voltage data detection circuit for RF AM signals in EPC0 compliant RFID tags
US20060238301A1 (en) * 2005-02-22 2006-10-26 Jiangfeng Wu Multi-protocol radio frequency identification transponder tranceiver
US7689195B2 (en) * 2005-02-22 2010-03-30 Broadcom Corporation Multi-protocol radio frequency identification transponder tranceiver
US7439781B2 (en) * 2005-07-28 2008-10-21 Fujitsu Limited Power detection circuit for non-contact IC card or RFID tag
CN101666833B (zh) * 2009-09-28 2012-08-15 王树甫 Cmos差分射频信号幅度检测电路
US8542777B2 (en) * 2010-01-07 2013-09-24 Mstar Semiconductor, Inc. Amplitude modulation demodulating circuit and method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105376004A (zh) * 2014-07-31 2016-03-02 展讯通信（上海）有限公司 一种自适应搜台装置及方法以及调频收音机
CN105376004B (zh) * 2014-07-31 2018-07-10 展讯通信（上海）有限公司 一种自适应搜台装置及方法以及调频收音机

Also Published As

Publication number Publication date
BR102012017358A2 (pt) 2014-02-18
WO2014008569A2 (pt) 2014-01-16
BR102012017358B1 (pt) 2020-12-29

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