IT1111661B - Sistema di sintonizzazione,per televisione,dotato di mezzi per la ricezione di portanti a radiofrequenza,presentanti freqzenze non standardizzate - Google Patents

Sistema di sintonizzazione,per televisione,dotato di mezzi per la ricezione di portanti a radiofrequenza,presentanti freqzenze non standardizzate

Info

Publication number
IT1111661B
IT1111661B IT23730/77A IT2373077A IT1111661B IT 1111661 B IT1111661 B IT 1111661B IT 23730/77 A IT23730/77 A IT 23730/77A IT 2373077 A IT2373077 A IT 2373077A IT 1111661 B IT1111661 B IT 1111661B
Authority
IT
Italy
Prior art keywords
freqzences
standardized
television
reception
tuning system
Prior art date
Application number
IT23730/77A
Other languages
English (en)
Italian (it)
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 US05/688,521 external-priority patent/US4031549A/en
Priority claimed from US05/688,588 external-priority patent/US4109283A/en
Application filed by Rca Corp filed Critical Rca Corp
Application granted granted Critical
Publication of IT1111661B publication Critical patent/IT1111661B/it

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)
IT23730/77A 1976-05-21 1977-05-18 Sistema di sintonizzazione,per televisione,dotato di mezzi per la ricezione di portanti a radiofrequenza,presentanti freqzenze non standardizzate IT1111661B (it)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
IT1111661B true IT1111661B (it) 1986-01-13

Family

ID=27104242

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23730/77A IT1111661B (it) 1976-05-21 1977-05-18 Sistema di sintonizzazione,per televisione,dotato di mezzi per la ricezione di portanti a radiofrequenza,presentanti freqzenze non standardizzate

Country Status (10)

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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917254A (enrdf_load_stackoverflow) * 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

Also Published As

Publication number Publication date
DE2722659C2 (de) 1985-05-30
FR2361789A1 (fr) 1978-03-10
DE2722659A1 (de) 1977-11-24
AU514310B2 (en) 1981-02-05
AT381819B (de) 1986-12-10
JPS5310920A (en) 1978-01-31
FI771529A7 (enrdf_load_stackoverflow) 1977-11-22
AU2476177A (en) 1978-11-09
GB1581933A (en) 1980-12-31
SE7705644L (sv) 1977-11-22
HK33386A (en) 1986-05-23
JPS5928297B2 (ja) 1984-07-12
SE415720B (sv) 1980-10-20
ATA364577A (de) 1986-04-15
FI65516C (fi) 1984-05-10
FI65516B (fi) 1984-01-31
FR2361789B1 (enrdf_load_stackoverflow) 1982-11-19

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19960529