Classifications

• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
  • H03L7/00—Automatic control of frequency or phase; Synchronisation
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
  • H03L7/00—Automatic control of frequency or phase; Synchronisation
  • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
  • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
  • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
  • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
  • H03L7/193—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider
• • 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
  • H03J5/0272—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 used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer

Landscapes

• Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Superheterodyne Receivers (AREA)
• Channel Selection Circuits, Automatic Tuning Circuits (AREA)
• Noise Elimination (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=23036881

Family Applications (1)

Country Status (12)

Families Citing this family (7)

Family Cites Families (7)

• 1981
  • 1981-06-05 US US06/271,742 patent/US4368540A/en not_active Expired - Lifetime
• 1982
  • 1982-05-28 GB GB8215721A patent/GB2100536B/en not_active Expired
  • 1982-05-28 ES ES512620A patent/ES512620A0/es active Granted
  • 1982-05-31 CA CA000404100A patent/CA1175491A/en not_active Expired
  • 1982-05-31 AU AU84342/82A patent/AU553024B2/en not_active Ceased
  • 1982-06-04 JP JP57096864A patent/JPS57211820A/ja active Granted
  • 1982-06-04 DE DE19823221267 patent/DE3221267A1/de active Granted
  • 1982-06-04 IT IT21717/82A patent/IT1151280B/it active
  • 1982-06-04 FR FR8209813A patent/FR2507410B1/fr not_active Expired
  • 1982-06-04 KR KR8202515A patent/KR900005463B1/ko not_active IP Right Cessation
  • 1982-06-04 AT AT0218082A patent/AT394649B/de not_active IP Right Cessation
• 1989
  • 1989-07-06 HK HK537/89A patent/HK53789A/xx not_active IP Right Cessation

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