FR2258756A1 - - Google Patents

Info

Publication number
FR2258756A1
FR2258756A1 FR7500342A FR7500342A FR2258756A1 FR 2258756 A1 FR2258756 A1 FR 2258756A1 FR 7500342 A FR7500342 A FR 7500342A FR 7500342 A FR7500342 A FR 7500342A FR 2258756 A1 FR2258756 A1 FR 2258756A1
Authority
FR
France
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.)
Withdrawn
Application number
FR7500342A
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 FR2258756A1 publication Critical patent/FR2258756A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H03J7/08—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 varactors, i.e. voltage variable reactive diodes
    • H03J7/10—Modification of automatic frequency control sensitivity or linearising automatic frequency control operation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
FR7500342A 1974-01-18 1975-01-07 Withdrawn FR2258756A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US434402A US3928808A (en) 1974-01-18 1974-01-18 Analog voltage generators for television tuners

Publications (1)

Publication Number Publication Date
FR2258756A1 true FR2258756A1 (fr) 1975-08-18

Family

ID=23724093

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7500342A Withdrawn FR2258756A1 (fr) 1974-01-18 1975-01-07

Country Status (7)

Country Link
US (1) US3928808A (fr)
JP (1) JPS5513615B2 (fr)
CA (1) CA1039871A (fr)
DE (1) DE2457899A1 (fr)
FR (1) FR2258756A1 (fr)
GB (1) GB1488191A (fr)
IT (1) IT1026884B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1518712A (en) * 1975-08-28 1978-07-26 Sony Corp Channel selecting apparatus
US4131853A (en) * 1976-12-22 1978-12-26 Curtis Mathes Manufacturing Co. Electronic multiple channel tuner
JPS5534507A (en) * 1978-09-01 1980-03-11 Hitachi Ltd Electronic tuning television picture receiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568112A (en) * 1969-02-12 1971-03-02 Gen Instrument Corp Digital pushbutton tuning for signal-controlled receiver
JPS5119921B1 (fr) * 1970-11-28 1976-06-21
US3810022A (en) * 1972-07-21 1974-05-07 Zenith Radio Corp Digital to analog converter television tuning of varactor tuners
JPS5123124A (en) * 1974-08-20 1976-02-24 Matsushita Electric Ind Co Ltd Jikihetsudono seizoho

Also Published As

Publication number Publication date
CA1039871A (fr) 1978-10-03
JPS50104822A (fr) 1975-08-19
IT1026884B (it) 1978-10-20
US3928808A (en) 1975-12-23
DE2457899A1 (de) 1975-07-24
GB1488191A (en) 1977-10-05
JPS5513615B2 (fr) 1980-04-10

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Legal Events

Date Code Title Description
ST Notification of lapse