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
Links
- 230000015654 memory Effects 0.000 abstract 3
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)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Superheterodyne Receivers (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Circuits Of Receivers In General (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.
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)
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)
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 |
-
1979
- 1979-02-16 DE DE19792906059 patent/DE2906059A1/de not_active Withdrawn
- 1979-02-20 FI FI790564A patent/FI790564A/fi unknown
- 1979-02-21 FR FR7904428A patent/FR2418592A1/fr active Granted
- 1979-02-21 IT IT20399/79A patent/IT1193179B/it active
- 1979-02-22 BE BE193631A patent/BE874367A/xx not_active IP Right Cessation
- 1979-02-22 ES ES477973A patent/ES477973A1/es not_active Expired
- 1979-02-22 AR AR275587A patent/AR224730A1/es active
- 1979-02-22 BR BR7901178A patent/BR7901178A/pt unknown
- 1979-02-22 NL NL7901412A patent/NL7901412A/xx not_active Application Discontinuation
- 1979-02-22 JP JP1911779A patent/JPS54125910A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
NL7901412A (nl) | 1979-08-24 |
JPS54125910A (en) | 1979-09-29 |
BR7901178A (pt) | 1979-10-09 |
FR2418592A1 (fr) | 1979-09-21 |
IT1193179B (it) | 1988-06-02 |
DE2906059A1 (de) | 1979-08-30 |
FI790564A (fi) | 1979-08-23 |
IT7920399A0 (it) | 1979-02-21 |
FR2418592B1 (es) | 1985-02-15 |
BE874367A (fr) | 1979-06-18 |
AR224730A1 (es) | 1982-01-15 |
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