ES477973A1 - Perfeccionamientos en sistemas de control de sintesis de frecuencia para equipos de comunicaciones. - Google Patents

Perfeccionamientos en sistemas de control de sintesis de frecuencia para equipos de comunicaciones.

Info

Publication number
ES477973A1
ES477973A1 ES477973A ES477973A ES477973A1 ES 477973 A1 ES477973 A1 ES 477973A1 ES 477973 A ES477973 A ES 477973A ES 477973 A ES477973 A ES 477973A ES 477973 A1 ES477973 A1 ES 477973A1
Authority
ES
Spain
Prior art keywords
frequency
frequency synthesizer
receiver
synthesizer controller
divider
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
ES477973A
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.)
Plessey Handel und Investments AG
Original Assignee
Plessey Handel und Investments AG
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 Plessey Handel und Investments AG filed Critical Plessey Handel und Investments AG
Publication of ES477973A1 publication Critical patent/ES477973A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/193—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H03J5/0281—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer the digital values being held in an auxiliary non erasable memory
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/06—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers
    • H03J7/065—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using counters or frequency dividers the counter or frequency divider being used in a phase locked loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

Perfeccionamientos en sistemas de control de síntesis de frecuencia para equipos de comunicaciones que comprende un oscilador de frecuencia variable, cuya frecuencia cambia para efectuar la sintonización de canal o frecuencia del equipo, caracterizados porque se dota a cada sistema de control, de un dispositivo divisor que funciona actuando sobre la señal de salida del oscilador de frecuencia variable, cuyo dispositivo divisor comprende un divisor variable cuya relación de división es elegible de acuerdo con un canal o frecuencia requerido; un dispositivo de ajuste organizado por lo menos en dos partes, cada una de las cuales sirve para ajustar la relación de división del divisor variable de acuerdo con un canal o frecuencia elegidos de un grupo respectivo de canales o frecuencias, y medios de control que actúan para elegir una parte respectiva dependiendo del grupo requerido de canales o frecuencias.
ES477973A 1978-02-22 1979-02-22 Perfeccionamientos en sistemas de control de sintesis de frecuencia para equipos de comunicaciones. Expired ES477973A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB714078 1978-02-22

Publications (1)

Publication Number Publication Date
ES477973A1 true ES477973A1 (es) 1979-10-16

Family

ID=9827385

Family Applications (1)

Application Number Title Priority Date Filing Date
ES477973A Expired ES477973A1 (es) 1978-02-22 1979-02-22 Perfeccionamientos en sistemas de control de sintesis de frecuencia para equipos de comunicaciones.

Country Status (10)

Country Link
JP (1) JPS54125910A (es)
AR (1) AR224730A1 (es)
BE (1) BE874367A (es)
BR (1) BR7901178A (es)
DE (1) DE2906059A1 (es)
ES (1) ES477973A1 (es)
FI (1) FI790564A (es)
FR (1) FR2418592A1 (es)
IT (1) IT1193179B (es)
NL (1) NL7901412A (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627768A1 (de) * 1986-08-16 1988-02-18 Standard Elektrik Lorenz Ag Einrichtung fuer die auswahl bestimmter empfangskanaele in einem auf empfangskanaele abstimmbaren empfangsgeraet der unterhaltungselektronik
DE3634246A1 (de) * 1986-10-08 1988-04-21 Grundig Emv Abstimmsystem, insbesondere fuer videogeneratoren und fernsehempfaenger
DE3830921A1 (de) * 1988-09-12 1990-03-22 Grundig Emv Anordnung zur anpassung eines empfangsgeraetes an verschiedene kanalraster

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1047373B (it) * 1975-10-16 1980-09-10 Indesit Disposizione per selezionare una frequenza ricevibile in un ricevitore di segnali

Also Published As

Publication number Publication date
FI790564A (fi) 1979-08-23
AR224730A1 (es) 1982-01-15
FR2418592B1 (es) 1985-02-15
NL7901412A (nl) 1979-08-24
BE874367A (fr) 1979-06-18
JPS54125910A (en) 1979-09-29
IT1193179B (it) 1988-06-02
DE2906059A1 (de) 1979-08-30
BR7901178A (pt) 1979-10-09
IT7920399A0 (it) 1979-02-21
FR2418592A1 (fr) 1979-09-21

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