GB1539647A - Tuning circuit for a heterodyne receiver - Google Patents

Tuning circuit for a heterodyne receiver

Info

Publication number
GB1539647A
GB1539647A GB45723/77A GB4572377A GB1539647A GB 1539647 A GB1539647 A GB 1539647A GB 45723/77 A GB45723/77 A GB 45723/77A GB 4572377 A GB4572377 A GB 4572377A GB 1539647 A GB1539647 A GB 1539647A
Authority
GB
United Kingdom
Prior art keywords
tuning circuit
heterodyne receiver
heterodyne
receiver
tuning
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
GB45723/77A
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 GB1539647A publication Critical patent/GB1539647A/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)
GB45723/77A 1976-11-06 1977-11-03 Tuning circuit for a heterodyne receiver Expired GB1539647A (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
GB1539647A true GB1539647A (en) 1979-01-31

Family

ID=5992565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45723/77A Expired GB1539647A (en) 1976-11-06 1977-11-03 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
ES463879A1 (en) 1978-07-01
IT1086992B (en) 1985-05-31
FR2370388A1 (en) 1978-06-02
DE2650822B2 (en) 1979-07-12
SE422264B (en) 1982-02-22
SE7712451L (en) 1978-05-06
DE2650822A1 (en) 1978-05-11
DE2650822C3 (en) 1980-03-13
JPS5357902A (en) 1978-05-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee