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ES463879A1 - Tuning circuit for a heterodyne receiver - Google Patents

Tuning circuit for a heterodyne receiver

Info

Publication number
ES463879A1
ES463879A1 ES463879A ES463879A ES463879A1 ES 463879 A1 ES463879 A1 ES 463879A1 ES 463879 A ES463879 A ES 463879A ES 463879 A ES463879 A ES 463879A ES 463879 A1 ES463879 A1 ES 463879A1
Authority
ES
Spain
Prior art keywords
tuning
voltage
digital
maneuvered
code word
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
ES463879A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of ES463879A1 publication Critical patent/ES463879A1/en
Expired 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
    • 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
    • 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

Landscapes

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

Abstract

Improvements in tuning connections for superposition receivers, with a tuning oscillator maneuvered with voltage and with digital warehouses for the storage of code words, coordinated to individual tuning values and with a digital-analogue converter, by means of which, maneuvered by a stored code word, a tuning voltage is generated, forming in the digital/analogue converter, in a digital connection part, a periodic pulse voltage, with a pulse/pause/ratio by the code word, of the that then, in a screening member, with a deep pass character, the tuning voltage is obtained, and with a regulating afc connection, in which, by means of a discriminator, a regulation voltage is obtained, which is superimposed on the voltage of tuning. (Machine-translation by Google Translate, not legally binding)
ES463879A 1976-11-06 1977-11-04 Tuning circuit for a heterodyne receiver Expired ES463879A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2650822A DE2650822C3 (en) 1976-11-06 1976-11-06 Tuning circuit for a heterodyne receiver

Publications (1)

Publication Number Publication Date
ES463879A1 true ES463879A1 (en) 1978-07-01

Family

ID=5992565

Family Applications (1)

Application Number Title Priority Date Filing Date
ES463879A Expired ES463879A1 (en) 1976-11-06 1977-11-04 Tuning circuit for a heterodyne receiver

Country Status (7)

Country Link
JP (1) JPS5357902A (en)
DE (1) DE2650822C3 (en)
ES (1) ES463879A1 (en)
FR (1) FR2370388A1 (en)
GB (1) GB1539647A (en)
IT (1) IT1086992B (en)
SE (1) SE422264B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4245351A (en) * 1979-07-30 1981-01-13 Rca Corporation AFT Arrangement for a phase locked loop tuning system
DE3912837A1 (en) * 1989-04-19 1990-10-25 Thomson Brandt Gmbh CONTROL CIRCUIT

Also Published As

Publication number Publication date
IT1086992B (en) 1985-05-31
DE2650822C3 (en) 1980-03-13
FR2370388A1 (en) 1978-06-02
DE2650822A1 (en) 1978-05-11
DE2650822B2 (en) 1979-07-12
JPS5357902A (en) 1978-05-25
GB1539647A (en) 1979-01-31
SE7712451L (en) 1978-05-07
SE422264B (en) 1982-02-22

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