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FR2386216A1 - Circuit electrique de division de frequence pour reglage d'accord d'un recepteur de television - Google Patents

Circuit electrique de division de frequence pour reglage d'accord d'un recepteur de television

Info

Publication number
FR2386216A1
FR2386216A1 FR7808964A FR7808964A FR2386216A1 FR 2386216 A1 FR2386216 A1 FR 2386216A1 FR 7808964 A FR7808964 A FR 7808964A FR 7808964 A FR7808964 A FR 7808964A FR 2386216 A1 FR2386216 A1 FR 2386216A1
Authority
FR
France
Prior art keywords
television receiver
state
electrical circuit
amplifier
counter
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
FR7808964A
Other languages
English (en)
Other versions
FR2386216B1 (fr
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of FR2386216A1 publication Critical patent/FR2386216A1/fr
Application granted granted Critical
Publication of FR2386216B1 publication Critical patent/FR2386216B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/38—Starting, stopping or resetting the counter

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

L'invention concerne un circuit électrique à utiliser dans la partie sélectrice de canaux d'un récepteur de télévision. Le circuit comprend un sélecteur de bandes 30 qui, dans un premier état 1, commande le passage d'une première bande de fréquences (par exemple des signaux UHF) dans un compteur 10 à destination d'une première entrée 21a, 21b d'un amplificateur-multiplexeur 20 et qui, dans un autre état 2, commande le passage et l'amplification d'une seconde bande de fréquences (par exemple des signaux VHF) appliquée à une seconde entrée 23a, 23b de l'amplificateur-multiplexeur 20. Dans un premier état, le compteur est en service, tandis que, dans l'autre état, le compteur n'est pas en service et seuls les signaux de la seconde bande sont traités par l'amplificateur-multiplexeur à destination des étages suivants du recepteur de télévision. Le circuit de l'invention permet le traitement en multiplexage de bandes de différentes fréquences, tout en réduisant les parasites et la diaphonie.
FR7808964A 1977-03-28 1978-03-28 Circuit electrique de division de frequence pour reglage d'accord d'un recepteur de television Granted FR2386216A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/781,878 US4127820A (en) 1977-03-28 1977-03-28 Electrical circuit for multiplexing and dividing different bands or frequencies

Publications (2)

Publication Number Publication Date
FR2386216A1 true FR2386216A1 (fr) 1978-10-27
FR2386216B1 FR2386216B1 (fr) 1980-07-04

Family

ID=25124249

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808964A Granted FR2386216A1 (fr) 1977-03-28 1978-03-28 Circuit electrique de division de frequence pour reglage d'accord d'un recepteur de television

Country Status (14)

Country Link
US (1) US4127820A (fr)
JP (1) JPS53120316A (fr)
AT (1) AT385615B (fr)
AU (2) AU513878B2 (fr)
CA (1) CA1098974A (fr)
DE (1) DE2812991C3 (fr)
FI (1) FI67460C (fr)
FR (1) FR2386216A1 (fr)
GB (1) GB1595374A (fr)
HK (1) HK56883A (fr)
IT (1) IT1093718B (fr)
MY (1) MY8500706A (fr)
SE (1) SE418440B (fr)
SG (1) SG38483G (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507410A1 (fr) * 1981-06-05 1982-12-10 Rca Corp Dispositif d'accord a boucle a verrouillage de phase comprenant un compteur a predetermination conditionne pour osciller a une frequence hors de bande

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317228A (en) * 1979-10-15 1982-02-23 Zenith Radio Corporation Television receiver having multiplexed phase lock loop tuning system
US4379271A (en) * 1980-08-25 1983-04-05 Rca Corporation Input selection arrangement for applying different local oscillator signals to a prescaler of a phase-lock loop tuning system
JPS59122161A (ja) * 1982-12-28 1984-07-14 Toshiba Corp ブロ−ドバンドネツトワ−クシステム
JPS60149227A (ja) * 1984-01-13 1985-08-06 Sony Corp Ｓｈｆ受信機
US5115317A (en) * 1989-12-22 1992-05-19 Alps Electric Co., Ltd. Tuning apparatus for a television receiver including selectively activated amplifier and local oscillator circuits
US6445228B1 (en) * 2001-08-28 2002-09-03 Xilinx, Inc. Programmable even-number clock divider circuit with duty cycle correction and optional phase shift
US6714057B2 (en) * 2001-08-28 2004-03-30 Xilinx, Inc. Multi-purpose digital frequency synthesizer circuit for a programmable logic device
US7135924B2 (en) * 2005-01-28 2006-11-14 Semiconductor Components Industries, L.L.C. Cross-talk reduction circuit and method therefor
JP2007300300A (ja) * 2006-04-28 2007-11-15 Alps Electric Co Ltd テレビジョンチューナ用集積回路及びテレビジョンチューナ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1502225A (fr) * 1965-12-01 1967-11-18 Euratom Dispositif numérique de commutation à bascules
DE2623783A1 (de) * 1975-05-30 1976-12-02 Sanyo Electric Co Ueberlagerungsempfaenger fuer mehrere frequenzbaender mit digital steuerbarem normalfrequenzgenerator

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752934A (en) * 1969-12-19 1973-08-14 N Shoichi Stereo demodulating circuit triggered by a minimum input signal level
US3707603A (en) * 1969-12-29 1972-12-26 Rca Corp Fm stereophonic receiver detection apparatus and disabling means
JPS50135912A (fr) * 1974-03-30 1975-10-28
US3883807A (en) * 1974-05-30 1975-05-13 Motorola Inc Tuning control system
US3942122A (en) * 1974-10-15 1976-03-02 Quasar Electronics Corporation Multiband tuner control system
JPS5533747Y2 (fr) * 1975-04-14 1980-08-11
US3997796A (en) * 1975-05-14 1976-12-14 Ncr Corporation High speed divide-by-two circuit
US4024476A (en) * 1976-02-02 1977-05-17 Rca Corporation Programmable frequency divider for a television receiver frequency synthesizer
US4019118A (en) * 1976-03-29 1977-04-19 Rca Corporation Third harmonic signal generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1502225A (fr) * 1965-12-01 1967-11-18 Euratom Dispositif numérique de commutation à bascules
DE2623783A1 (de) * 1975-05-30 1976-12-02 Sanyo Electric Co Ueberlagerungsempfaenger fuer mehrere frequenzbaender mit digital steuerbarem normalfrequenzgenerator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507410A1 (fr) * 1981-06-05 1982-12-10 Rca Corp Dispositif d'accord a boucle a verrouillage de phase comprenant un compteur a predetermination conditionne pour osciller a une frequence hors de bande

Also Published As

Publication number Publication date
FI780886A (fi) 1978-09-29
HK56883A (en) 1983-11-25
MY8500706A (en) 1985-12-31
SG38483G (en) 1984-07-20
DE2812991C3 (de) 1981-11-12
DE2812991A1 (de) 1978-10-05
GB1595374A (en) 1981-08-12
AU513878B2 (en) 1981-01-08
IT7821634A0 (it) 1978-03-24
AU3428178A (en) 1979-09-27
FI67460C (fi) 1985-03-11
AT385615B (de) 1988-04-25
JPS53120316A (en) 1978-10-20
AU3458178A (en) 1979-10-04
IT1093718B (it) 1985-07-26
SE418440B (sv) 1981-05-25
DE2812991B2 (de) 1981-02-19
CA1098974A (fr) 1981-04-07
US4127820A (en) 1978-11-28
JPS6141442B2 (fr) 1986-09-16
FR2386216B1 (fr) 1980-07-04
FI67460B (fi) 1984-11-30
SE7803249L (sv) 1978-09-29
ATA218078A (de) 1987-09-15

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse