ES472449A1 - Mejoras a un aparato de funcion de logica con falla sin pe- ligro - Google Patents

Mejoras a un aparato de funcion de logica con falla sin pe- ligro

Info

Publication number
ES472449A1
ES472449A1 ES472449A ES472449A ES472449A1 ES 472449 A1 ES472449 A1 ES 472449A1 ES 472449 A ES472449 A ES 472449A ES 472449 A ES472449 A ES 472449A ES 472449 A1 ES472449 A1 ES 472449A1
Authority
ES
Spain
Prior art keywords
logic function
function apparatus
signal section
failsafe logic
section
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
ES472449A
Other languages
English (en)
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of ES472449A1 publication Critical patent/ES472449A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/007—Fail-safe circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Electronic Switches (AREA)
  • Logic Circuits (AREA)

Abstract

Mejoras a un aparato de función de lógica con falla sin peligro, para proveer una señal de salida responsiva a una primera señal de entrada y a una segunda señal de entrada aplicada al aparato, caracterizadas porque el aparato comprende un primer emisor para emitir energía luminosa en respuesta a la primera señal de entrada; un segundo emisor para emitir energía luminosa en respuesta a la segunda señal de entrada, siendo el segundo emisor responsivo para ser conectado por la energia luminosa emitida por el primer emisor para producir energia luminosa; y un indicador acoplado para ser responsivo a la energia luminosa emitida por el segundo emisor para proveer la señal de salida, comprendiendo cada uno de los emisores primero y segundo un diodo emisor de luz que tiene una polarizacion de voltaje de referencia.
ES472449A 1977-08-10 1978-08-08 Mejoras a un aparato de funcion de logica con falla sin pe- ligro Expired ES472449A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/823,482 US4179629A (en) 1977-08-10 1977-08-10 Failsafe logic function apparatus

Publications (1)

Publication Number Publication Date
ES472449A1 true ES472449A1 (es) 1979-10-01

Family

ID=25238888

Family Applications (1)

Application Number Title Priority Date Filing Date
ES472449A Expired ES472449A1 (es) 1977-08-10 1978-08-08 Mejoras a un aparato de funcion de logica con falla sin pe- ligro

Country Status (7)

Country Link
US (1) US4179629A (es)
JP (1) JPS5440554A (es)
BR (1) BR7805005A (es)
CA (1) CA1118503A (es)
ES (1) ES472449A1 (es)
GB (1) GB2002612B (es)
MX (1) MX144507A (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5550117A (en) * 1978-10-06 1980-04-11 Fanuc Ltd Led light source device for pulse encoder
US4328541A (en) * 1980-05-23 1982-05-04 American Standard Inc. Fail-safe digital comparator
CA1215179A (en) * 1983-02-28 1986-12-09 Westinghouse Electric Corporation Versatile input circuit for sensing the status of a voltage input over a wide range of voltage levels and waveforms
GB2138229B (en) * 1983-04-08 1987-05-13 Gec General Signal Ltd Opto-isolator arrangement
JPS60242723A (ja) * 1984-05-17 1985-12-02 Nec Corp 光スイツチ回路
JPS62172818A (ja) * 1986-01-27 1987-07-29 Matsushita Electric Works Ltd 絶縁アンド回路
DE4025888C2 (de) * 1990-08-16 2000-08-31 Elan Schaltelemente Gmbh & Co Schaltungsanordnung mit bei Bauelementeausfällen einen vorgegebenen Signalzustand aufweisenden Ausgang
US5189307A (en) * 1992-03-13 1993-02-23 Empi, Inc. Isolated current mirror with optical insulator generating feedback signal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264513C2 (de) * 1963-11-29 1973-01-25 Texas Instruments Inc Bezugspotentialfreier gleichstromdifferenzverstaerker
US3486029A (en) * 1965-12-29 1969-12-23 Gen Electric Radiative interconnection arrangement
US3826930A (en) * 1973-06-05 1974-07-30 Westinghouse Electric Corp Fail-safe optically coupled logic networks
US3975643A (en) * 1974-01-23 1976-08-17 Westinghouse Air Brake Company Fail-safe opto-electronic phase inverting circuits
US3995173A (en) * 1974-05-30 1976-11-30 General Signal Corporation Solid state fail-safe logic system

Also Published As

Publication number Publication date
BR7805005A (pt) 1979-04-17
MX144507A (es) 1981-10-21
GB2002612B (en) 1982-05-19
JPS5440554A (en) 1979-03-30
US4179629A (en) 1979-12-18
CA1118503A (en) 1982-02-16
GB2002612A (en) 1979-02-21

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20000601