FR2422293A1 - RECEIVER MOUNTING INCLUDING A FREQUENCY SYNTHESIZER FOR RADIO, TELEVISION OR EQUIVALENT RECEIVING DEVICES - Google Patents

RECEIVER MOUNTING INCLUDING A FREQUENCY SYNTHESIZER FOR RADIO, TELEVISION OR EQUIVALENT RECEIVING DEVICES

Info

Publication number
FR2422293A1
FR2422293A1 FR7908469A FR7908469A FR2422293A1 FR 2422293 A1 FR2422293 A1 FR 2422293A1 FR 7908469 A FR7908469 A FR 7908469A FR 7908469 A FR7908469 A FR 7908469A FR 2422293 A1 FR2422293 A1 FR 2422293A1
Authority
FR
France
Prior art keywords
frequency
oscillator
voltage
television
radio
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
FR7908469A
Other languages
French (fr)
Other versions
FR2422293B1 (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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of FR2422293A1 publication Critical patent/FR2422293A1/en
Application granted granted Critical
Publication of FR2422293B1 publication Critical patent/FR2422293B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

L'invention concerne un montage récepteur à synthétiseur. Le synthétiseur comprend un diviseur pour la fréquence d'un oscillateur commandé en tension et dont la fréquence de sortie est comparée phase à une fréquence de référence. L'écart de phase sert de tension réglante dudit oscillateur. Un régulateur comprenant un discriminateur de fréquence et une diode capacitive corrige automatiquement l'accord de fréquence de l'oscillateur, il produit une tension réglante fonction de l'écart entre la fréquence de réception et la fréquence de l'oscillateur réglée au moyen du synthétiseur, par application d'une tension à la diode capacitive. La tension réglante est transformée en une information numérique servant à modifier le rapport de division du diviseur de fréquence. L'invention s'applique aux appareils de télécommunication.The invention relates to a receiver-synthesizer arrangement. The synthesizer includes a divider for the frequency of a voltage-controlled oscillator, the output frequency of which is phase-compared to a reference frequency. The phase difference serves as the regulating voltage of said oscillator. A regulator comprising a frequency discriminator and a capacitive diode automatically corrects the frequency tuning of the oscillator, it produces a regulating voltage depending on the difference between the reception frequency and the frequency of the oscillator set by means of the synthesizer , by applying a voltage to the capacitive diode. The regulating voltage is transformed into digital information for changing the division ratio of the frequency divider. The invention applies to telecommunications devices.

FR7908469A 1978-04-04 1979-04-04 RECEIVER MOUNTING INCLUDING A FREQUENCY SYNTHESIZER FOR RADIO, TELEVISION OR EQUIVALENT RECEIVING DEVICES Granted FR2422293A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2814429A DE2814429C3 (en) 1978-04-04 1978-04-04 Receiver circuit with a frequency sytithetizer in telecommunications receiving devices

Publications (2)

Publication Number Publication Date
FR2422293A1 true FR2422293A1 (en) 1979-11-02
FR2422293B1 FR2422293B1 (en) 1982-06-18

Family

ID=6036101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7908469A Granted FR2422293A1 (en) 1978-04-04 1979-04-04 RECEIVER MOUNTING INCLUDING A FREQUENCY SYNTHESIZER FOR RADIO, TELEVISION OR EQUIVALENT RECEIVING DEVICES

Country Status (7)

Country Link
CH (1) CH641608A5 (en)
DE (1) DE2814429C3 (en)
FR (1) FR2422293A1 (en)
GB (1) GB2018065B (en)
IT (1) IT1111927B (en)
NL (1) NL180795C (en)
SE (1) SE427885B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444369A1 (en) * 1978-12-15 1980-07-11 Sony Corp TUNING APPARATUS

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA81769B (en) * 1980-02-18 1982-02-24 Sangamo Weston Receivers suitable for use in remotely-operable switching devices and data transmission systems
CA1259378A (en) * 1985-09-19 1989-09-12 Noriaki Omoto A.f.c. system for broad-band fm receiver
US4959872A (en) * 1988-06-23 1990-09-25 Kabushiki Kaisha Toshiba Automatic frequency control apparatus for FM receivers
JP4089003B2 (en) * 1998-04-01 2008-05-21 ソニー株式会社 Receiver and receiving method
JP3978744B2 (en) * 2002-07-25 2007-09-19 パイオニア株式会社 Digital to analog converter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1412412A1 (en) * 1960-12-27 1968-10-03 Metz App Werke Automatic sharpening
US3624512A (en) * 1969-06-02 1971-11-30 Rca Corp Automatic frequency control system
US3845393A (en) * 1972-03-17 1974-10-29 Philips Corp Communication receiver with tuning circuits that track the l.o.
US4025953A (en) * 1975-11-26 1977-05-24 Quasar Electronics Corporation Frequency synthesizer tuning system for television receivers
US4041535A (en) * 1976-07-22 1977-08-09 Matsushita Electric Corporation Of America Frequency synthesizer tuning system with signal seek control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1412412A1 (en) * 1960-12-27 1968-10-03 Metz App Werke Automatic sharpening
US3624512A (en) * 1969-06-02 1971-11-30 Rca Corp Automatic frequency control system
US3845393A (en) * 1972-03-17 1974-10-29 Philips Corp Communication receiver with tuning circuits that track the l.o.
US4025953A (en) * 1975-11-26 1977-05-24 Quasar Electronics Corporation Frequency synthesizer tuning system for television receivers
US4041535A (en) * 1976-07-22 1977-08-09 Matsushita Electric Corporation Of America Frequency synthesizer tuning system with signal seek control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2444369A1 (en) * 1978-12-15 1980-07-11 Sony Corp TUNING APPARATUS

Also Published As

Publication number Publication date
FR2422293B1 (en) 1982-06-18
NL180795C (en) 1987-04-16
DE2814429C3 (en) 1980-10-09
NL7902658A (en) 1979-10-08
IT1111927B (en) 1986-01-13
DE2814429A1 (en) 1979-10-25
GB2018065A (en) 1979-10-10
SE427885B (en) 1983-05-09
CH641608A5 (en) 1984-02-29
IT7921591A0 (en) 1979-04-04
GB2018065B (en) 1982-07-21
DE2814429B2 (en) 1980-02-21
SE7902787L (en) 1979-10-05
NL180795B (en) 1986-11-17

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right
ST Notification of lapse