FR2361789A1 - Systeme d'accord pour un televiseur avec possibilite de recevoir une porteuse haute frequence a une frequence non normalisee - Google Patents

Systeme d'accord pour un televiseur avec possibilite de recevoir une porteuse haute frequence a une frequence non normalisee

Info

Publication number
FR2361789A1
FR2361789A1 FR7715582A FR7715582A FR2361789A1 FR 2361789 A1 FR2361789 A1 FR 2361789A1 FR 7715582 A FR7715582 A FR 7715582A FR 7715582 A FR7715582 A FR 7715582A FR 2361789 A1 FR2361789 A1 FR 2361789A1
Authority
FR
France
Prior art keywords
signal
oscillator
frequency
tuning
carrier
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
FR7715582A
Other languages
English (en)
Other versions
FR2361789B1 (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
Priority claimed from US05/688,588 external-priority patent/US4109283A/en
Priority claimed from US05/688,521 external-priority patent/US4031549A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2361789A1 publication Critical patent/FR2361789A1/fr
Application granted granted Critical
Publication of FR2361789B1 publication Critical patent/FR2361789B1/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
    • 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)
  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

L'invention concerne un dispositif d'accord d'un téléviseur à un canal choisi, avec une entrée d'une porteuse HF, un oscillateur local, un mélangeur dérivant un signal IF, un premier moyen d'accord du signal d'oscillateur à la fréquence nominale allouée au canal choisi, un second moyen d'accord de ce signal pour diminuer l'écart entre la fréquence de la porteuse et sa fréquence nominale; et un moyen de commande pour coupler l'un ou l'autre à l'oscillateur. Selon l'invention un moyen 70 de détection de verrouillage produit un signal quand le premier moyen 28, 30, 32, 34, 40 accorde l'oscillateur local 26 à la fréquence nominale, le moyen de commande 64, 72 couplant le second moyen 66 à l'oscillateur en réponse; un moyen 78 de détection de décalage produit un signal quand la fréquence de l'oscillateur dévie de plus d'une valeur prédéterminée; un moyen 76 produit un signal pour accorder l'oscillateur 26 à une fréquence qui diffère d'un incrément de celle de son signal pendant l'intervalle initial. L'invention s'applique notamment aux téléviseurs pouvant recevoir des porteuses à des fréquences non normalisées.
FR7715582A 1976-05-21 1977-05-20 Systeme d'accord pour un televiseur avec possibilite de recevoir une porteuse haute frequence a une frequence non normalisee Granted FR2361789A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/688,588 US4109283A (en) 1976-05-21 1976-05-21 Frequency counter for a television tuning system
US05/688,521 US4031549A (en) 1976-05-21 1976-05-21 Television tuning system with provisions for receiving RF carrier at nonstandard frequency

Publications (2)

Publication Number Publication Date
FR2361789A1 true FR2361789A1 (fr) 1978-03-10
FR2361789B1 FR2361789B1 (fr) 1982-11-19

Family

ID=27104242

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7715582A Granted FR2361789A1 (fr) 1976-05-21 1977-05-20 Systeme d'accord pour un televiseur avec possibilite de recevoir une porteuse haute frequence a une frequence non normalisee

Country Status (10)

Country Link
JP (1) JPS5928297B2 (fr)
AT (1) AT381819B (fr)
AU (1) AU514310B2 (fr)
DE (1) DE2722659C2 (fr)
FI (1) FI65516C (fr)
FR (1) FR2361789A1 (fr)
GB (1) GB1581933A (fr)
HK (1) HK33386A (fr)
IT (1) IT1111661B (fr)
SE (1) SE415720B (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917254A (fr) * 1972-06-05 1974-02-15
US3949158A (en) * 1974-12-31 1976-04-06 Quasar Electronics Corporation Wide band aft circuit for television receiver
IT1073074B (it) * 1975-11-14 1985-04-13 Rca Corp Sintetizzatore di frequenze televisive,per portanti di frequenza non standardizzata
US4078212A (en) * 1976-02-27 1978-03-07 Rca Corporation Dual mode frequency synthesizer for a television tuning apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Also Published As

Publication number Publication date
DE2722659C2 (de) 1985-05-30
SE7705644L (sv) 1977-11-22
DE2722659A1 (de) 1977-11-24
FI65516B (fi) 1984-01-31
AT381819B (de) 1986-12-10
FI65516C (fi) 1984-05-10
JPS5310920A (en) 1978-01-31
SE415720B (sv) 1980-10-20
GB1581933A (en) 1980-12-31
ATA364577A (de) 1986-04-15
AU2476177A (en) 1978-11-09
IT1111661B (it) 1986-01-13
JPS5928297B2 (ja) 1984-07-12
HK33386A (en) 1986-05-23
FR2361789B1 (fr) 1982-11-19
FI771529A7 (fr) 1977-11-22
AU514310B2 (en) 1981-02-05

Similar Documents

Publication Publication Date Title
ES2098319T3 (es) Control de frecuencia en sistemas de radio moviles de banda lateral unica.
JPH05211669A (ja) ケーブル・テレビジョン試験装置
KR830007005A (ko) 선국장치
KR920702081A (ko) 자동 이득 제어 회로
US4189679A (en) Noise detecting circuit having noise-immune AGC
FR2361789A1 (fr) Systeme d'accord pour un televiseur avec possibilite de recevoir une porteuse haute frequence a une frequence non normalisee
EP0339647A3 (fr) Appareil et procédé pour la réception de la radiodiffusion par satellites
EP0521403A1 (fr) Récepteur de radio avec suppression du glissement de la fréquence intermédiaire
GB1017078A (en) Radio frequency signal defect suppressor
US4314376A (en) Double-sideband, suppressed-carrier, signal injection apparatus for muting in an FM receiver
GB669582A (en) Improvements in coded electrical signal transmitters
FR2371095A1 (fr) Circuit d'entree pour recepteur vhf
US3388331A (en) Automatic frequency control of a radio receiver
KR860003737A (ko) 미동조 장치
KR100374488B1 (ko) 이미지 혼신 제거 수신 장치
US2630528A (en) Panoramic receiver frequency setting means
EP0104688A1 (fr) Récepteur comprenant un circuit de recherche d'accord
JPS5752268A (en) Horizontal synchronizing circuit
JPS58151737A (ja) 干渉検出回路
JP2003230057A (ja) テレビジョン信号送信機
KR960032888A (ko) 채널 자동 선국시 채널 중복 방지 방법
KR960000105Y1 (ko) 무선전화기에서의 송수신 주파수 합성회로
JPH0537547Y2 (fr)
GB1212734A (en) Improvements in or relating to underwater echo-sounding
JPH0533110Y2 (fr)

Legal Events

Date Code Title Description
TP Transmission of property