BR7704727A - Aperfeicoamento em sistema de sintonia sintetizador de frequencia com busca de sinal - Google Patents

Aperfeicoamento em sistema de sintonia sintetizador de frequencia com busca de sinal

Info

Publication number
BR7704727A
BR7704727A BR7704727A BR7704727A BR7704727A BR 7704727 A BR7704727 A BR 7704727A BR 7704727 A BR7704727 A BR 7704727A BR 7704727 A BR7704727 A BR 7704727A BR 7704727 A BR7704727 A BR 7704727A
Authority
BR
Brazil
Prior art keywords
improvement
frequency synthesizer
system frequency
tuning system
signal search
Prior art date
Application number
BR7704727A
Other languages
English (en)
Portuguese (pt)
Inventor
S Sideris
T Rzeszewski
P Frantzis
Original Assignee
Matsusnita Electric Corp Of Am
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 Matsusnita Electric Corp Of Am filed Critical Matsusnita Electric Corp Of Am
Publication of BR7704727A publication Critical patent/BR7704727A/pt

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
    • H03J7/18—Automatic scanning over a band of frequencies
    • 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
    • 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
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers
    • H03J7/285—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element 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)
  • Superheterodyne Receivers (AREA)
  • Television Receiver Circuits (AREA)
BR7704727A 1976-07-22 1977-07-18 Aperfeicoamento em sistema de sintonia sintetizador de frequencia com busca de sinal BR7704727A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/707,674 US4041535A (en) 1976-07-22 1976-07-22 Frequency synthesizer tuning system with signal seek control

Publications (1)

Publication Number Publication Date
BR7704727A true BR7704727A (pt) 1978-04-25

Family

ID=24842674

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7704727A BR7704727A (pt) 1976-07-22 1977-07-18 Aperfeicoamento em sistema de sintonia sintetizador de frequencia com busca de sinal

Country Status (4)

Country Link
US (1) US4041535A (enExample)
JP (1) JPS5333517A (enExample)
BR (1) BR7704727A (enExample)
CA (1) CA1097830A (enExample)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422096A (en) * 1975-11-14 1983-12-20 Rca Corporation Television frequency synthesizer for nonstandard frequency carriers
JPS5810015B2 (ja) * 1975-12-24 1983-02-23 ソニー株式会社 センキヨクソウチ
US4128849A (en) * 1976-05-24 1978-12-05 Admiral Corporation Selectively coupled synthesizer for tuner of TV receiver
US4236182A (en) * 1977-04-30 1980-11-25 Sharp Kabushiki Kaisha Automatic pre-programming system for TV receivers
GB1564375A (en) * 1977-09-07 1980-04-10 Marconi Co Ltd Frequency generators
JPS5487008A (en) * 1977-12-22 1979-07-11 Alps Electric Co Ltd Pll channel selector
DE2814429C3 (de) * 1978-04-04 1980-10-09 Loewe Opta Gmbh, 1000 Berlin Empfängerschaltung mit einem Frequenz sytithetisator in nachrichtentechnischen Empfangsgeräten
US4300165A (en) * 1978-04-07 1981-11-10 General Electric Company Dual mode automatic fine tuning
US4214274A (en) * 1978-06-19 1980-07-22 Matsushita Electric Corporation Frequency synthesizer tuning system with variable dwell signal seek
JPS602709Y2 (ja) * 1978-09-05 1985-01-25 ソニー株式会社 同期信号検出回路
GB2030018B (en) * 1978-09-15 1983-03-23 Plessey Co Ltd Receiver arrangement
US4360832A (en) * 1979-03-26 1982-11-23 Matsushita Electric Corporation Frequency synthesizer tuning system for television receivers
US4397038A (en) * 1979-03-26 1983-08-02 Matsushita Electric Corporation Of America Frequency synthesizer tuning system for television receivers
JPS5925526B2 (ja) * 1979-05-16 1984-06-19 アルプス電気株式会社 選局装置
US4254506A (en) * 1979-05-30 1981-03-03 Rca Corporation Channel identification apparatus useful in a multiband sweep type tuning system
NZ193794A (en) * 1979-05-30 1984-03-30 Rca Corp Channel identification in multiband sweep tuning system
JPS55161472A (en) * 1979-06-04 1980-12-16 Hitachi Ltd Channel selection unit of television receiver
IT1132434B (it) * 1979-08-27 1986-07-02 Rca Corp Sistema di sintonizzazione del tipo a ricerca
US4264977A (en) * 1979-08-29 1981-04-28 Rca Corporation Search type tuning system
US4280140A (en) * 1980-02-19 1981-07-21 Zenith Radio Corporation Microcomputer-controlled one-step-back automatic frequency control tuning system
JPS5732123A (en) * 1980-08-05 1982-02-20 Toshiba Corp Channel selector
US4429415A (en) 1981-11-30 1984-01-31 Rca Corporation Signal-seeking tuning system with signal loss protection for a television receiver
US4398303A (en) * 1981-11-30 1983-08-09 Rca Corporation Signal-seeking tuning system with automatic bandswitching for a television receiver
JPS5980015A (ja) * 1982-10-29 1984-05-09 Pioneer Electronic Corp チユ−ナの同調周波数設定動作指令発生装置
DE3837130A1 (de) * 1988-11-02 1990-05-03 Thomson Brandt Gmbh Satelliten-rundfunkempfaenger
JPH02125072U (enExample) * 1989-03-27 1990-10-15
JP2004328054A (ja) * 2003-04-21 2004-11-18 Sharp Corp Ｐｌｌ回路およびそれを用いるテレビジョン受信機ならびにテレビジョン受信機のビート改善方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5425366B2 (enExample) * 1971-11-29 1979-08-28
US3973228A (en) * 1974-09-04 1976-08-03 Quasar Electronics Corporation Electronic tuner control system
US3949158A (en) * 1974-12-31 1976-04-06 Quasar Electronics Corporation Wide band aft circuit for television receiver
US3980951A (en) * 1975-08-13 1976-09-14 Fairchild Camera And Instrument Corporation Electronic tuning control system for television

Also Published As

Publication number Publication date
JPS5333517A (en) 1978-03-29
CA1097830A (en) 1981-03-17
US4041535A (en) 1977-08-09
JPS5751770B2 (enExample) 1982-11-04

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