ES8105905A1 - Un circuito de convertidor para senales de radiofrecuencia - Google Patents

Un circuito de convertidor para senales de radiofrecuencia

Info

Publication number
ES8105905A1
ES8105905A1 ES494374A ES494374A ES8105905A1 ES 8105905 A1 ES8105905 A1 ES 8105905A1 ES 494374 A ES494374 A ES 494374A ES 494374 A ES494374 A ES 494374A ES 8105905 A1 ES8105905 A1 ES 8105905A1
Authority
ES
Spain
Prior art keywords
frequency
converter circuit
superheterodyne receiver
circuit
signal
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
ES494374A
Other languages
English (en)
Other versions
ES494374A0 (es
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
Publication of ES8105905A1 publication Critical patent/ES8105905A1/es
Publication of ES494374A0 publication Critical patent/ES494374A0/es
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/16—Multiple-frequency-changing
    • H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
    • H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Television Systems (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

UN CIRCUITO DE CONVERTIDOR PARA SEÑALES DE RADIOFRECUENCIA. EL CIRCUITO POSEE UNA ENTRADA DE SEÑAL OPTICA (4) Y UNA SALIDA DE SEÑAL (3) CONECTADA A LA ENTRADA DE ANTENA DE UN RECEPTOR SUPERHETERODINO DE TV (2). EL CIRCUITO DE BUSQUEDA DE FRECUENCIA (20), QUE SE ACOMPLA A LA SALIDA (3) MEDIANTE UN ACOPLADOR DIRECCIONAL (5), COMPRENDE UN PASO MEZCLADOR (7), OSCILADOR CONTROLABLE (10), UN FILTRO DE PASABAJOS (8) Y UN CIRCUITO DE CONTROL (9). EL CIRCUITO DE CONTROL (9) POSEE UN RELOJ (26) Y UN GENERADOR (27) DE ESCALERA. EL RECEPTOR OPOTICO (11) COMPRENDE UN CONVERTIDOR (22) DE SEÑAL OPTICA A ELECTRICA Y UN SELECTOR (21) DE SEÑAL DE TV. EL MODULADOR (18) COMPRENDE: UN PASO MEZCLADOR (16), UN OSCILADOR DE FRECUENCIA FIJA (19), UN PASO MEZCLADOR (15) Y UN FILTRO DE PASO DE BANDA (6). DE APLICACION EN REDES CATV (ANTENA COLECTIVA DE TELEVISION) DE FIBRA OPTICA Y EN REDES CATV USUALES.
ES494374A 1979-08-22 1980-08-20 Un circuito de convertidor para senales de radiofrecuencia Granted ES494374A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7906336A NL7906336A (nl) 1979-08-22 1979-08-22 Konverteerschakeling voor t.v. signalen.

Publications (2)

Publication Number Publication Date
ES8105905A1 true ES8105905A1 (es) 1981-06-01
ES494374A0 ES494374A0 (es) 1981-06-01

Family

ID=19833711

Family Applications (1)

Application Number Title Priority Date Filing Date
ES494374A Granted ES494374A0 (es) 1979-08-22 1980-08-20 Un circuito de convertidor para senales de radiofrecuencia

Country Status (8)

Country Link
EP (1) EP0024763B1 (es)
JP (1) JPS5631236A (es)
AT (1) AT382748B (es)
AU (1) AU532278B2 (es)
CA (1) CA1161117A (es)
DE (1) DE3068111D1 (es)
ES (1) ES494374A0 (es)
NL (1) NL7906336A (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58203033A (ja) * 1982-05-24 1983-11-26 Bridgestone Corp 未加硫ゴムシ−ト切断装置
DE3433721A1 (de) * 1984-09-14 1986-03-27 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Schaltungsanordnung zur umsetzung einer frequenz fuer fernsehempfaenger

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618743A (en) * 1947-10-24 1952-11-18 Nielsen A C Co System and apparatus for determining the listening habits of wave signal receiver users
CA1029815A (en) * 1971-03-04 1978-04-18 Floyd O. Vincent Method and apparatus for converting electrical signals

Also Published As

Publication number Publication date
NL7906336A (nl) 1981-02-24
AU6158480A (en) 1981-04-09
DE3068111D1 (en) 1984-07-12
AT382748B (de) 1987-04-10
EP0024763A1 (en) 1981-03-11
ATA426380A (de) 1986-08-15
ES494374A0 (es) 1981-06-01
EP0024763B1 (en) 1984-06-06
CA1161117A (en) 1984-01-24
JPS5631236A (en) 1981-03-30
AU532278B2 (en) 1983-09-22

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