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
  • H03J5/0245—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
  • 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

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)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11270275

Family Applications (1)

Country Status (14)

Families Citing this family (5)

Family Cites Families (9)

• 1976
  • 1976-05-03 IT IT49305/76A patent/IT1061633B/it active
• 1977
  • 1977-04-18 GB GB15938/77A patent/GB1550307A/en not_active Expired
  • 1977-04-20 PT PT66458A patent/PT66458B/pt unknown
  • 1977-04-21 AU AU24513/77A patent/AU512370B2/en not_active Expired
  • 1977-04-25 NO NO771408A patent/NO771408L/no unknown
  • 1977-04-27 US US05/791,251 patent/US4137502A/en not_active Expired - Lifetime
  • 1977-04-29 DE DE19772719152 patent/DE2719152A1/de not_active Withdrawn
  • 1977-05-02 SE SE7705065A patent/SE7705065L/xx unknown
  • 1977-05-02 FR FR7713201A patent/FR2350733A1/fr active Granted
  • 1977-05-02 NL NL7704816A patent/NL7704816A/nl not_active Application Discontinuation
  • 1977-05-02 DK DK190877A patent/DK190877A/da not_active Application Discontinuation
  • 1977-05-02 ES ES458384A patent/ES458384A1/es not_active Expired
  • 1977-05-02 CH CH547177A patent/CH615541A5/de not_active IP Right Cessation
  • 1977-05-03 BE BE177217A patent/BE854203A/xx not_active IP Right Cessation

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