WO2003007563A3 - Ask demodulator for chip cards - Google Patents

Ask demodulator for chip cards Download PDF

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Publication number
WO2003007563A3
WO2003007563A3 PCT/DE2002/002407 DE0202407W WO03007563A3 WO 2003007563 A3 WO2003007563 A3 WO 2003007563A3 DE 0202407 W DE0202407 W DE 0202407W WO 03007563 A3 WO03007563 A3 WO 03007563A3
Authority
WO
WIPO (PCT)
Prior art keywords
filter
differentiator
disposed downstream
demodulator
output signal
Prior art date
Application number
PCT/DE2002/002407
Other languages
German (de)
French (fr)
Other versions
WO2003007563A2 (en
Inventor
Gerhard Nebel
Robert Reiner
Werner Schroeder
Original Assignee
Infineon Technologies Ag
Gerhard Nebel
Robert Reiner
Werner Schroeder
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 Infineon Technologies Ag, Gerhard Nebel, Robert Reiner, Werner Schroeder filed Critical Infineon Technologies Ag
Publication of WO2003007563A2 publication Critical patent/WO2003007563A2/en
Publication of WO2003007563A3 publication Critical patent/WO2003007563A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The invention relates to a demodulator for demodulating a voltage that is modulated by a modification of the amplitude between a low and a high level, especially for use in contact-less data transmission from a card write/read device to a chip card. The inventive demodulator is provided with a dynamic range circuit (2) that reduces the dynamic response of the input signal (1), a filter (3) disposed downstream of said dynamic range circuit (2) and adapted to filter a high-frequency carrier signal, a differentiator (4) disposed downstream of the filter (3) and adapted to amplify the sides of the output signal of the filter (3), and a comparator (5) disposed downstream of the differentiator and used to compare the output signal of the differentiator (4) with at least one predetermined threshold value (VHIGH, VLOW).
PCT/DE2002/002407 2001-07-13 2002-07-02 Ask demodulator for chip cards WO2003007563A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10134102.4 2001-07-13
DE2001134102 DE10134102A1 (en) 2001-07-13 2001-07-13 demodulator

Publications (2)

Publication Number Publication Date
WO2003007563A2 WO2003007563A2 (en) 2003-01-23
WO2003007563A3 true WO2003007563A3 (en) 2003-07-31

Family

ID=7691679

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002407 WO2003007563A2 (en) 2001-07-13 2002-07-02 Ask demodulator for chip cards

Country Status (3)

Country Link
DE (1) DE10134102A1 (en)
TW (1) TW578362B (en)
WO (1) WO2003007563A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109714283B (en) * 2019-01-04 2020-09-04 四川中微芯成科技有限公司 ASK amplitude modulation signal demodulation circuit and demodulation method
CN112019469B (en) * 2019-05-31 2023-03-03 博通集成电路（上海）股份有限公司 Demodulator and method for demodulating amplitude shift keying signal
CN114079605B (en) * 2020-08-13 2023-05-23 立锜科技股份有限公司 Communication signal demodulation device and communication signal demodulation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732663A2 (en) * 1995-03-15 1996-09-18 Omron Corporation Data carrier capable of increasing data transmission rate
DE19858099A1 (en) * 1998-12-16 2000-06-29 Texas Instruments Deutschland Demodulator circuit for ASK modulated signal, has amplitude limiter, envelope curve detector, differentiating element, band pass filter, comparator, logic output circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732663A2 (en) * 1995-03-15 1996-09-18 Omron Corporation Data carrier capable of increasing data transmission rate
DE19858099A1 (en) * 1998-12-16 2000-06-29 Texas Instruments Deutschland Demodulator circuit for ASK modulated signal, has amplitude limiter, envelope curve detector, differentiating element, band pass filter, comparator, logic output circuit

Also Published As

Publication number Publication date
DE10134102A1 (en) 2003-01-30
WO2003007563A2 (en) 2003-01-23
TW578362B (en) 2004-03-01

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