GB2037512B - Circuit arrangement for achieving synchronisation - Google Patents

Circuit arrangement for achieving synchronisation

Info

Publication number
GB2037512B
GB2037512B GB7935853A GB7935853A GB2037512B GB 2037512 B GB2037512 B GB 2037512B GB 7935853 A GB7935853 A GB 7935853A GB 7935853 A GB7935853 A GB 7935853A GB 2037512 B GB2037512 B GB 2037512B
Authority
GB
United Kingdom
Prior art keywords
circuit arrangement
achieving synchronisation
synchronisation
achieving
arrangement
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
GB7935853A
Other versions
GB2037512A (en
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
Licentia Oy
Original Assignee
Licentia Patent Verwaltungs GmbH
Licentia Oy
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
Priority claimed from DE19782844938 external-priority patent/DE2844938C2/en
Priority claimed from DE19782845005 external-priority patent/DE2845005A1/en
Priority claimed from DE2856397A external-priority patent/DE2856397C2/en
Application filed by Licentia Patent Verwaltungs GmbH, Licentia Oy filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB2037512A publication Critical patent/GB2037512A/en
Application granted granted Critical
Publication of GB2037512B publication Critical patent/GB2037512B/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
    • H03J5/0245—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
    • H03J5/0281—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 the digital values being held in an auxiliary non erasable memory
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmitters (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB7935853A 1978-10-16 1979-10-16 Circuit arrangement for achieving synchronisation Expired GB2037512B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19782844938 DE2844938C2 (en) 1978-10-16 1978-10-16 Circuit arrangement for achieving synchronization between the oscillator frequency and the resonance frequency of the input circuit of a heterodyne receiver
DE19782845005 DE2845005A1 (en) 1978-10-16 1978-10-16 Frequency dependent signal derivation - uses two alternating voltages with intermediate direct voltage varying with their frequency ratio
DE2856397A DE2856397C2 (en) 1978-12-28 1978-12-28 Circuit arrangement for achieving synchronization between the oscillator frequency and the resonance frequency of the input circuit of a heterodyne receiver.

Publications (2)

Publication Number Publication Date
GB2037512A GB2037512A (en) 1980-07-09
GB2037512B true GB2037512B (en) 1983-09-01

Family

ID=27187711

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7935853A Expired GB2037512B (en) 1978-10-16 1979-10-16 Circuit arrangement for achieving synchronisation

Country Status (3)

Country Link
FR (1) FR2439507B1 (en)
GB (1) GB2037512B (en)
IT (1) IT1165325B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3066690B2 (en) * 1993-09-20 2000-07-17 富士通株式会社 Phase-locked oscillation circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617899A (en) * 1969-01-15 1971-11-02 Motorola Inc Tuning control for multiple electronically tuned circuits
US3657654A (en) * 1969-09-11 1972-04-18 Gen Instrument Corp Communications receiver employing varactor controlled tuning stages
US3701949A (en) * 1971-03-22 1972-10-31 Cutler Hammer Inc Wideband frequency scanning radio receiver
US3758865A (en) * 1972-01-18 1973-09-11 Gen Motors Corp Bias voltage generator for the voltage-responsive tuning elements in an electronically tuned radio receiver
FR2175671B1 (en) * 1972-03-17 1977-04-01 Trt Telecom Radio Electr
JPS5185303A (en) * 1975-01-23 1976-07-26 Tokyo Shibaura Electric Co

Also Published As

Publication number Publication date
FR2439507A1 (en) 1980-05-16
FR2439507B1 (en) 1986-07-04
GB2037512A (en) 1980-07-09
IT1165325B (en) 1987-04-22
IT7926513A0 (en) 1979-10-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee