FR2270634A1 - Reference voltage for TV and radio tuning - has potentiometers replaced by cheap electronic circuits and uses analogue-digital converter - Google Patents

Reference voltage for TV and radio tuning - has potentiometers replaced by cheap electronic circuits and uses analogue-digital converter

Info

Publication number
FR2270634A1
FR2270634A1 FR7514559A FR7514559A FR2270634A1 FR 2270634 A1 FR2270634 A1 FR 2270634A1 FR 7514559 A FR7514559 A FR 7514559A FR 7514559 A FR7514559 A FR 7514559A FR 2270634 A1 FR2270634 A1 FR 2270634A1
Authority
FR
France
Prior art keywords
digital
potentiometers
replaced
analogue
reference voltage
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
FR7514559A
Other languages
French (fr)
Other versions
FR2270634B1 (en
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.)
Industriaktiebolaget Luxor
Original Assignee
Industriaktiebolaget Luxor
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 Industriaktiebolaget Luxor filed Critical Industriaktiebolaget Luxor
Publication of FR2270634A1 publication Critical patent/FR2270634A1/en
Application granted granted Critical
Publication of FR2270634B1 publication Critical patent/FR2270634B1/fr
Granted 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
    • 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
    • H03J5/0254—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 transfered to a D/A converter
    • H03J5/0263—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 transfered to a D/A converter the digital values being held in an auxiliary non erasable memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

A presettable voltage is generated by converting a digital signal into a voltage using a digital-analogue convertor in conjunction with a primary voltage source. An input unit produces the digital signal and has several control elements for rapid alteration of the signal at any time. The signal is transmitted to a programme control unit where it is stored for extraction by an operator and transfer into the digital-analogue convertor. Pref. the input unit has a primary voltage source and a potentiometer which produces a voltage for conversion to a digital signal in an analogue-digital convertor.
FR7514559A 1974-05-10 1975-05-09 Reference voltage for TV and radio tuning - has potentiometers replaced by cheap electronic circuits and uses analogue-digital converter Granted FR2270634A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7406277A SE7406277L (en) 1974-05-10 1974-05-10 PROGRAMMABLE VOLTAGE SOURCE.

Publications (2)

Publication Number Publication Date
FR2270634A1 true FR2270634A1 (en) 1975-12-05
FR2270634B1 FR2270634B1 (en) 1977-04-15

Family

ID=20321101

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7514559A Granted FR2270634A1 (en) 1974-05-10 1975-05-09 Reference voltage for TV and radio tuning - has potentiometers replaced by cheap electronic circuits and uses analogue-digital converter

Country Status (5)

Country Link
JP (1) JPS50155955A (en)
DE (1) DE2520676A1 (en)
FR (1) FR2270634A1 (en)
NL (1) NL7505107A (en)
SE (1) SE7406277L (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350733A1 (en) * 1976-05-03 1977-12-02 Voxson Spa RADIO RECEIVER OR TUNING DEVICE EQUIPPED WITH A SEMICONDUCTOR MEMORIZATION ORGAN, FOR A LARGE NUMBER OF RECEPTION FREQUENCIES
FR2407629A1 (en) * 1977-10-31 1979-05-25 Rca Corp CHORD SYSTEM INCLUDING A MEMORY TO STORE CHORD INFORMATION, WITH USER COMMANDS AGENCY TO FACILITATE ITS PROGRAMMING

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289999A (en) * 1979-05-14 1981-09-15 Ampex Corporation Digital variable voltage level control circuit with automatic return to neutral
DE3216547C1 (en) * 1982-05-04 1983-10-06 Krautkraemer Gmbh Method and circuit device for generating and changing a predetermined number of independent DC voltages

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141522B2 (en) * 1971-12-29 1976-11-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350733A1 (en) * 1976-05-03 1977-12-02 Voxson Spa RADIO RECEIVER OR TUNING DEVICE EQUIPPED WITH A SEMICONDUCTOR MEMORIZATION ORGAN, FOR A LARGE NUMBER OF RECEPTION FREQUENCIES
FR2407629A1 (en) * 1977-10-31 1979-05-25 Rca Corp CHORD SYSTEM INCLUDING A MEMORY TO STORE CHORD INFORMATION, WITH USER COMMANDS AGENCY TO FACILITATE ITS PROGRAMMING

Also Published As

Publication number Publication date
FR2270634B1 (en) 1977-04-15
NL7505107A (en) 1975-11-12
SE7406277L (en) 1975-11-11
JPS50155955A (en) 1975-12-16
DE2520676A1 (en) 1975-11-13

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Legal Events

Date Code Title Description
ST Notification of lapse