ES388476A1 - A tuning device for a television receiver. (Machine-translation by Google Translate, not legally binding) - Google Patents

A tuning device for a television receiver. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES388476A1
ES388476A1 ES388476A ES388476A ES388476A1 ES 388476 A1 ES388476 A1 ES 388476A1 ES 388476 A ES388476 A ES 388476A ES 388476 A ES388476 A ES 388476A ES 388476 A1 ES388476 A1 ES 388476A1
Authority
ES
Spain
Prior art keywords
video
translation
signals whose
machine
television receiver
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.)
Expired
Application number
ES388476A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES388476A1 publication Critical patent/ES388476A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

A tuner device for a superheterodyne television receiver for the reception of signals whose audio carrier is lower than that of video, as well as signals whose audio carrier is higher than the video carrier, provided with a local oscillator having a resonant circuit tunable by a variable capacitance, for example a variable capacity diode, characterized in that the resonant circuit of the local oscillator comprises switching means to switch this circuit between a state that is suitable for the reception of signals whose audio carrier is more lower than the video and a state that is suitable for the reception of signals whose audio carrier is higher than that of video, the switching means varying in the same direction the inductance of the circuit as well as the operational capacitance in series with the variable capacitance when switching from one state to another. (Machine-translation by Google Translate, not legally binding)
ES388476A 1970-02-23 1971-02-20 A tuning device for a television receiver. (Machine-translation by Google Translate, not legally binding) Expired ES388476A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7006322A FR2080065A5 (en) 1970-02-23 1970-02-23

Publications (1)

Publication Number Publication Date
ES388476A1 true ES388476A1 (en) 1973-05-01

Family

ID=9051071

Family Applications (1)

Application Number Title Priority Date Filing Date
ES388476A Expired ES388476A1 (en) 1970-02-23 1971-02-20 A tuning device for a television receiver. (Machine-translation by Google Translate, not legally binding)

Country Status (5)

Country Link
BE (1) BE763279A (en)
CH (1) CH517424A (en)
DE (1) DE2105151B2 (en)
ES (1) ES388476A1 (en)
FR (1) FR2080065A5 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2261395C2 (en) * 1972-12-15 1976-01-08 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for a tuning device with capacitance diodes for at least two frequency ranges
FR2371821A1 (en) * 1976-10-25 1978-06-16 Indesit TUNING DEVICE FOR TELEVISION RECEIVER
JPS58200606A (en) * 1982-05-17 1983-11-22 Sharp Corp Oscillating circuit
JPS5970026A (en) * 1982-10-13 1984-04-20 Hitachi Ltd Oscillator circuit

Also Published As

Publication number Publication date
DE2105151B2 (en) 1979-03-08
FR2080065A5 (en) 1971-11-12
BE763279A (en) 1971-08-23
DE2105151A1 (en) 1971-09-02
CH517424A (en) 1971-12-31

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