ES2078860A2 - Circuito de desmagnetizacion secuencial. - Google Patents

Circuito de desmagnetizacion secuencial.

Info

Publication number
ES2078860A2
ES2078860A2 ES09301880A ES9301880A ES2078860A2 ES 2078860 A2 ES2078860 A2 ES 2078860A2 ES 09301880 A ES09301880 A ES 09301880A ES 9301880 A ES9301880 A ES 9301880A ES 2078860 A2 ES2078860 A2 ES 2078860A2
Authority
ES
Spain
Prior art keywords
capacitor
sequential
demagnetizing coil
demagnetization
thyristors
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.)
Granted
Application number
ES09301880A
Other languages
English (en)
Other versions
ES2078860B1 (es
ES2078860R (es
Inventor
Farras Josep Torrents
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.)
INSTRUMENTACION ELECTRONICA PR
Original Assignee
INSTRUMENTACION ELECTRONICA PR
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 INSTRUMENTACION ELECTRONICA PR filed Critical INSTRUMENTACION ELECTRONICA PR
Priority to ES9301880A priority Critical patent/ES2078860B1/es
Priority to AU75377/94A priority patent/AU7537794A/en
Priority to PCT/ES1994/000082 priority patent/WO1995007006A1/es
Publication of ES2078860A2 publication Critical patent/ES2078860A2/es
Publication of ES2078860R publication Critical patent/ES2078860R/es
Application granted granted Critical
Publication of ES2078860B1 publication Critical patent/ES2078860B1/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/29—Picture reproducers using cathode ray tubes using demagnetisation or compensation of external magnetic fields

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

CIRCUITO DE DESMAGNETIZACION SECUENCIAL. EL CIRCUITO DE DESMAGNETIZACION SECUENCIAL OBJETO DE LA INVENCION, RELACIONADO CON LOS SISTEMAS DE DESMAGNETIZACION DE LOS TUBOS DE IMAGEN DE COLOR PARA RECEPTORES Y MONITORES, ESTA CONSTITUIDO POR LA ASOCIACION FUNCIONAL DE UN CONDENSADOR (C) QUE A TRAVES DE RESISTENCIAS (R1), (R2) Y TIRISTORES (T1), (T2) SE CARGA ALTERNATIVAMENTE A UNA TENSION (+V1), UNA BOBINA DESMAGNETIZADORA (L) QUE JUNTO CON EL CONDENSADOR (C) FORMAN UN CIRCUITO RESONANTE POR EL CUAL CIRCULA UNA CORRIENTE ALTERNATIVA Y SECUENCIAL CUANDO SE DESCARGA LA ENERGIA ALMACENADA EN EL CONDENSADOR (C) A TRAVES DE LA BOBINA DESMAGNETIZADORA (L), DIODOS (D2), (D1) Y LOS TIRISTORES (T1), (T2), CONTROLADOS ESTOS ULTIMOS POR UN CIRCUITO DE CONTROL (CI) QUE ES UN MULTIVIBRADOR QUE SE CONECTA CUANDO APARECE UNA TENSION (+V2) Y QUE REDUCE SU FRECUENCIA DE OSCILACION CON EL TIEMPO HASTA QUE DESAPARECE, HACIENDO QUE LA CARGA SECUENCIAL DEL CONDENSADOR (C) SEA MENOR EN FUNCION DEL TIEMPO Y QUE SOLOCIRCULE POR LA BOBINA DESMAGNETIZADORA (L) EL PRIMER PERIODO DE OSCILACION AMORTIGUADA PRODUCIDA POR LA DESCARGA DEL CONDENSADOR (C), PARA A CONTINUACION VOLVER A CARGARLO Y REPETIR EL CICLO DE DESCARGA HASTA LA EXTINCION DE LA CORRIENTE OSCILATORIA.
ES9301880A 1993-08-31 1993-08-31 Circuito de desmagnetizacion secuencial. Expired - Lifetime ES2078860B1 (es)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES9301880A ES2078860B1 (es) 1993-08-31 1993-08-31 Circuito de desmagnetizacion secuencial.
AU75377/94A AU7537794A (en) 1993-08-31 1994-08-30 Sequential demagnetization circuit
PCT/ES1994/000082 WO1995007006A1 (es) 1993-08-31 1994-08-30 Circuito de desmagnetizacion secuencial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9301880A ES2078860B1 (es) 1993-08-31 1993-08-31 Circuito de desmagnetizacion secuencial.

Publications (3)

Publication Number Publication Date
ES2078860A2 true ES2078860A2 (es) 1995-12-16
ES2078860R ES2078860R (es) 1997-04-01
ES2078860B1 ES2078860B1 (es) 1997-11-16

Family

ID=8282957

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9301880A Expired - Lifetime ES2078860B1 (es) 1993-08-31 1993-08-31 Circuito de desmagnetizacion secuencial.

Country Status (3)

Country Link
AU (1) AU7537794A (es)
ES (1) ES2078860B1 (es)
WO (1) WO1995007006A1 (es)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282290A2 (en) * 1987-03-13 1988-09-14 RCA Thomson Licensing Corporation Resonant degaussing apparatus
EP0449626A1 (en) * 1990-03-28 1991-10-02 Kabushiki Kaisha Toshiba Degaussing circuit
EP0477399A1 (de) * 1990-09-25 1992-04-01 Siemens Aktiengesellschaft Einrichtung zur Entmagnetisierung einer Bildröhre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282290A2 (en) * 1987-03-13 1988-09-14 RCA Thomson Licensing Corporation Resonant degaussing apparatus
EP0449626A1 (en) * 1990-03-28 1991-10-02 Kabushiki Kaisha Toshiba Degaussing circuit
EP0477399A1 (de) * 1990-09-25 1992-04-01 Siemens Aktiengesellschaft Einrichtung zur Entmagnetisierung einer Bildröhre

Also Published As

Publication number Publication date
ES2078860B1 (es) 1997-11-16
AU7537794A (en) 1995-03-22
ES2078860R (es) 1997-04-01
WO1995007006A1 (es) 1995-03-09

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Legal Events

Date Code Title Description
EC2A Search report published

Date of ref document: 19951216

Kind code of ref document: R

Effective date: 19951216

FA2A Application withdrawn

Effective date: 19980806