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ES386872A1 - Frequency selection circuit - Google Patents

Frequency selection circuit

Info

Publication number
ES386872A1
ES386872A1 ES386872A ES386872A ES386872A1 ES 386872 A1 ES386872 A1 ES 386872A1 ES 386872 A ES386872 A ES 386872A ES 386872 A ES386872 A ES 386872A ES 386872 A1 ES386872 A1 ES 386872A1
Authority
ES
Spain
Prior art keywords
switchable
tuning
current
preselected
radio
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
ES386872A
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES386872A1 publication Critical patent/ES386872A1/en
Expired 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
    • H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

A manipulation circuit for programmed frequency selection in radio and television apparatus in which the tuning voltages or currents can be switched for the preselected frequencies by means of a variable resistance, particularly for the adjustment of radio and television apparatus, characterized by the combination of the following known circuit arrangements. a) Together with an electronic switch, particularly a bistable multivibrator, a switchable semiconductor or a relay, the variable resistance determining the preselected tuning voltage or the preselected tuning current form the switchable branch of a voltage or current divider. b) All switchable branches have a common drop resistance in which the switchable tuning voltage appears, or a common load circuit in which the switchable tuning current circulates, or each of the cursors of the variable resistors is connected to a common point through a diode. c) The current given in one switchable branch causes all other parallel branches to be without current. (Machine-translation by Google Translate, not legally binding)
ES386872A 1969-12-29 1970-12-28 Frequency selection circuit Expired ES386872A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691965223 DE1965223B2 (en) 1969-12-29 1969-12-29 SWITCHING FOR A PROGRAMMED FREQUENCY SELECTION IN RADIO AND TV

Publications (1)

Publication Number Publication Date
ES386872A1 true ES386872A1 (en) 1973-04-16

Family

ID=5755177

Family Applications (1)

Application Number Title Priority Date Filing Date
ES386872A Expired ES386872A1 (en) 1969-12-29 1970-12-28 Frequency selection circuit

Country Status (4)

Country Link
AT (1) AT339964B (en)
DE (1) DE1965223B2 (en)
ES (1) ES386872A1 (en)
GB (1) GB1331625A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5517582Y2 (en) * 1975-05-06 1980-04-23

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA804174A (en) * 1969-01-14 B. Cavanagh Robert Tuning of receivers such as radio or television receivers
US3264566A (en) * 1962-07-13 1966-08-02 Gen Instrument Corp Electronic switching of tuned circuits
DE1223898B (en) * 1963-12-07 1966-09-01 Telefunken Patent Circuit for remote tuning of an antenna amplifier
DE1466450B2 (en) * 1963-12-18 1972-03-02 Telefunken Patentverwertungsge Seilschaft mbH, 7900 Ulm TUNING DEVICE FOR EQUIPMENT OF HIGH FREQUENCY MESSAGE TECHNOLOGY, IN PARTICULAR TELEVISION RECEIVERS
US3440544A (en) * 1966-11-01 1969-04-22 Motorola Inc Manual,automatic,and semiautomatic tuning circuits utilizing voltage variable capacitance diodes

Also Published As

Publication number Publication date
DE1965223B2 (en) 1977-07-21
DE1965223A1 (en) 1971-07-01
AT339964B (en) 1977-11-25
ATA1151770A (en) 1977-03-15
GB1331625A (en) 1973-09-26

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19860206