ZA744889B - Noise rejection circuitry - Google Patents

Noise rejection circuitry

Info

Publication number
ZA744889B
ZA744889B ZA00744889A ZA744889A ZA744889B ZA 744889 B ZA744889 B ZA 744889B ZA 00744889 A ZA00744889 A ZA 00744889A ZA 744889 A ZA744889 A ZA 744889A ZA 744889 B ZA744889 B ZA 744889B
Authority
ZA
South Africa
Prior art keywords
noise rejection
rejection circuitry
circuitry
noise
rejection
Prior art date
Application number
ZA00744889A
Other languages
English (en)
Inventor
G Lichtblau
Original Assignee
G Lichtblau
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 G Lichtblau filed Critical G Lichtblau
Publication of ZA744889B publication Critical patent/ZA744889B/xx

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2414—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using inductive tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2471—Antenna signal processing by receiver or emitter

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Credit Cards Or The Like (AREA)
  • Geophysics And Detection Of Objects (AREA)
ZA00744889A 1973-08-20 1974-07-31 Noise rejection circuitry ZA744889B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00389728A US3828337A (en) 1973-08-20 1973-08-20 Noise rejection circuitry

Publications (1)

Publication Number Publication Date
ZA744889B true ZA744889B (en) 1975-08-27

Family

ID=23539479

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00744889A ZA744889B (en) 1973-08-20 1974-07-31 Noise rejection circuitry

Country Status (9)

Country Link
US (1) US3828337A (enrdf_load_stackoverflow)
JP (1) JPS533913B2 (enrdf_load_stackoverflow)
BR (1) BR7406375D0 (enrdf_load_stackoverflow)
CA (1) CA1033027A (enrdf_load_stackoverflow)
DE (1) DE2438218C2 (enrdf_load_stackoverflow)
FR (1) FR2241837B1 (enrdf_load_stackoverflow)
GB (1) GB1484353A (enrdf_load_stackoverflow)
IT (1) IT1011583B (enrdf_load_stackoverflow)
ZA (1) ZA744889B (enrdf_load_stackoverflow)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223830A (en) * 1978-08-18 1980-09-23 Walton Charles A Identification system
US4278900A (en) 1979-02-15 1981-07-14 Westinghouse Electric Corp. Fail-safe pulse providing apparatus
US4236068A (en) * 1979-03-29 1980-11-25 Walton Charles A Personal identification and signaling system
JPS57124548A (en) * 1981-01-26 1982-08-03 Nippon Koki Kk Casting method
US4429302A (en) * 1981-10-08 1984-01-31 I. D. Engineering, Inc. Electronic security system with noise rejection
US4476459A (en) * 1981-10-23 1984-10-09 Knogo Corporation Theft detection method and apparatus in which the decay of a resonant circuit is detected
US4728938A (en) * 1986-01-10 1988-03-01 Checkpoint Systems, Inc. Security tag deactivation system
US4779077A (en) * 1987-04-13 1988-10-18 Lichtblau G J Continuously armed high reliability pulse train processor
KR950004714B1 (ko) * 1988-06-20 1995-05-04 체크 포인트 시스템스, 인코오퍼레이티드 연속적으로 보강된 고신뢰성 펄스열 처리기
DE69033093T2 (de) 1989-10-31 1999-12-09 Checkpoint Systems, Inc. Verfahren zum etikettieren von artikeln in verbindung mit einem elektronischen artikelüberwachungssystem
US5081445A (en) * 1991-03-22 1992-01-14 Checkpoint Systems, Inc. Method for tagging articles used in conjunction with an electronic article surveillance system, and tags or labels useful in connection therewith
GB2282720A (en) * 1993-09-10 1995-04-12 Thomson Consumer Electronics Circuit for synchronizing a microprocessor in a TV receiver
US5508684A (en) * 1995-03-02 1996-04-16 Becker; Richard S. Article tag
US5798693A (en) * 1995-06-07 1998-08-25 Engellenner; Thomas J. Electronic locating systems
US7123129B1 (en) 1995-08-14 2006-10-17 Intermec Ip Corp. Modulation of the resonant frequency of a circuit using an energy field
US7002475B2 (en) * 1997-12-31 2006-02-21 Intermec Ip Corp. Combination radio frequency identification transponder (RFID tag) and magnetic electronic article surveillance (EAS) tag
US5812065A (en) 1995-08-14 1998-09-22 International Business Machines Corporation Modulation of the resonant frequency of a circuit using an energy field
WO1997038404A1 (en) * 1996-04-10 1997-10-16 Sentry Technology Corporation Electronic article surveillance system
US5909178A (en) * 1997-11-28 1999-06-01 Sensormatic Electronics Corporation Signal detection in high noise environments

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115622A (en) * 1958-10-15 1963-12-24 Polard Electronics Corp Panoramic scanning counter
US3500373A (en) * 1966-05-06 1970-03-10 Nat Bank Of North America The Method and apparatus for article theft detection
US3521280A (en) * 1969-01-16 1970-07-21 Gen Res Corp Coded labels
US3624631A (en) * 1970-04-27 1971-11-30 Sanders Associates Inc Pilferage control system
US3696379A (en) * 1970-12-02 1972-10-03 Knogo Corp Apparatus for article theft detection
US3752960A (en) * 1971-12-27 1973-08-14 C Walton Electronic identification & recognition system

Also Published As

Publication number Publication date
BR7406375D0 (pt) 1975-06-03
US3828337A (en) 1974-08-06
JPS533913B2 (enrdf_load_stackoverflow) 1978-02-10
DE2438218C2 (de) 1985-08-14
CA1033027A (en) 1978-06-13
IT1011583B (it) 1977-02-10
FR2241837A1 (enrdf_load_stackoverflow) 1975-03-21
JPS5051300A (enrdf_load_stackoverflow) 1975-05-08
FR2241837B1 (enrdf_load_stackoverflow) 1978-11-24
GB1484353A (en) 1977-09-01
DE2438218A1 (de) 1975-02-27

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