GB2015837B - Frequency synthesis control system - Google Patents

Frequency synthesis control system

Info

Publication number
GB2015837B
GB2015837B GB7903893A GB7903893A GB2015837B GB 2015837 B GB2015837 B GB 2015837B GB 7903893 A GB7903893 A GB 7903893A GB 7903893 A GB7903893 A GB 7903893A GB 2015837 B GB2015837 B GB 2015837B
Authority
GB
United Kingdom
Prior art keywords
control system
frequency synthesis
synthesis control
frequency
synthesis
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
GB7903893A
Other versions
GB2015837A (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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB7903893A priority Critical patent/GB2015837B/en
Publication of GB2015837A publication Critical patent/GB2015837A/en
Application granted granted Critical
Publication of GB2015837B publication Critical patent/GB2015837B/en
Expired legal-status Critical Current

Links

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
    • 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
    • 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
    • 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
    • H03J7/065—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 the counter or frequency divider being used in a phase locked loop
GB7903893A 1978-02-22 1979-02-05 Frequency synthesis control system Expired GB2015837B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7903893A GB2015837B (en) 1978-02-22 1979-02-05 Frequency synthesis control system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB714078 1978-02-22
GB7903893A GB2015837B (en) 1978-02-22 1979-02-05 Frequency synthesis control system

Publications (2)

Publication Number Publication Date
GB2015837A GB2015837A (en) 1979-09-12
GB2015837B true GB2015837B (en) 1982-06-03

Family

ID=26241234

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7903893A Expired GB2015837B (en) 1978-02-22 1979-02-05 Frequency synthesis control system

Country Status (1)

Country Link
GB (1) GB2015837B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107715A (en) * 1981-12-22 1983-06-27 Sony Corp Channel selecting device
DE3419340A1 (en) * 1984-05-24 1985-11-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt RADIO DEVICE FOR A VARIETY OF CHANNELS
US4870699A (en) * 1986-03-26 1989-09-26 General Electric Company Method and apparatus for controlling the frequency of operation and at least one further variable operating parameter of a radio communications device
US4905305A (en) * 1986-03-26 1990-02-27 General Electric Company Method and apparatus for controlling the frequency of operation and at least one further variable operating parameter of a radio communications device
GB8806200D0 (en) * 1988-03-16 1988-04-13 British Broadcasting Corp Improvements to rds radio receivers
GB2301962B (en) * 1992-07-15 1997-03-05 Futaba Denshi Kogyo Kk Receiver for radio control system
US5608770A (en) * 1993-09-21 1997-03-04 Ricoh Company, Ltd. Frequency converter outputting a clock signal having a stable and accurate frequency

Also Published As

Publication number Publication date
GB2015837A (en) 1979-09-12

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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