CA1175502A - Electronic security memory - Google Patents

Electronic security memory

Info

Publication number
CA1175502A
CA1175502A CA000364537A CA364537A CA1175502A CA 1175502 A CA1175502 A CA 1175502A CA 000364537 A CA000364537 A CA 000364537A CA 364537 A CA364537 A CA 364537A CA 1175502 A CA1175502 A CA 1175502A
Authority
CA
Canada
Prior art keywords
transistor
memory
voltage
oscillator
input
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.)
Expired
Application number
CA000364537A
Other languages
English (en)
French (fr)
Inventor
Bernard-Edouard Forward
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1175502A publication Critical patent/CA1175502A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/19—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using non-linear reactive devices in resonant circuits
    • G11C11/20—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using non-linear reactive devices in resonant circuits using parametrons

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Dc-Dc Converters (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
CA000364537A 1979-11-21 1980-11-13 Electronic security memory Expired CA1175502A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7928720 1979-11-21
FR7928720A FR2470478A1 (fr) 1979-11-21 1979-11-21 Memoire electronique de securite utilisable en signalisation ferroviaire

Publications (1)

Publication Number Publication Date
CA1175502A true CA1175502A (en) 1984-10-02

Family

ID=9231950

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000364537A Expired CA1175502A (en) 1979-11-21 1980-11-13 Electronic security memory

Country Status (7)

Country Link
US (1) US4376269A (cg-RX-API-DMAC7.html)
EP (1) EP0029631B1 (cg-RX-API-DMAC7.html)
JP (1) JPS5693200A (cg-RX-API-DMAC7.html)
AU (1) AU532027B2 (cg-RX-API-DMAC7.html)
CA (1) CA1175502A (cg-RX-API-DMAC7.html)
DE (1) DE3068461D1 (cg-RX-API-DMAC7.html)
FR (1) FR2470478A1 (cg-RX-API-DMAC7.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755772A (en) * 1987-06-05 1988-07-05 Avantek, Inc. Switchable microwave oscillator
JPH02113596A (ja) * 1988-10-21 1990-04-25 Nec Corp プリント回路基板
JPH03206655A (ja) * 1990-01-08 1991-09-10 Matsushita Electric Ind Co Ltd 電子回路基板
JPH05291735A (ja) * 1992-04-14 1993-11-05 Unisia Jecs Corp プリント配線基板
AU2003285675A1 (en) * 2003-01-10 2004-08-10 Koninklijke Philips Electronics N.V. Circuit arrangement and method for protecting electronic components against illicit manipulation
CN112441080B (zh) * 2019-08-30 2022-09-06 比亚迪股份有限公司 列车定位方法、设备、系统、计算机设备及存储介质
CN114744880B (zh) * 2022-04-17 2025-09-30 杭州欧佩捷科技有限公司 无额外绕组的zvs正激式变换器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1171567A (fr) * 1957-02-04 1959-01-28 Signaleur électronique
BE572303A (cg-RX-API-DMAC7.html) * 1957-11-15
FR1281318A (fr) * 1960-11-28 1962-01-12 Westinghouse Freins & Signaux Mémoire électronique de sécurité susceptible d'être temporisée
FR1405259A (fr) * 1964-05-11 1965-07-09 Westinghouse Freins & Signaux Détecteur de proximité influençable, en particulier, par un bandage de véhicule ferroviaire

Also Published As

Publication number Publication date
FR2470478B1 (cg-RX-API-DMAC7.html) 1985-02-01
US4376269A (en) 1983-03-08
EP0029631B1 (fr) 1984-07-04
AU6447480A (en) 1981-05-28
EP0029631A1 (fr) 1981-06-03
DE3068461D1 (en) 1984-08-09
AU532027B2 (en) 1983-09-15
FR2470478A1 (fr) 1981-05-29
JPS6336077B2 (cg-RX-API-DMAC7.html) 1988-07-19
JPS5693200A (en) 1981-07-28

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Legal Events

Date Code Title Description
MKEX Expiry