GB2340679B - Frequency synthesis - Google Patents

Frequency synthesis

Info

Publication number
GB2340679B
GB2340679B GB9817908A GB9817908A GB2340679B GB 2340679 B GB2340679 B GB 2340679B GB 9817908 A GB9817908 A GB 9817908A GB 9817908 A GB9817908 A GB 9817908A GB 2340679 B GB2340679 B GB 2340679B
Authority
GB
United Kingdom
Prior art keywords
frequency synthesis
synthesis
frequency
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 - Fee Related
Application number
GB9817908A
Other versions
GB9817908D0 (en
GB2340679A (en
Inventor
Robert Owen Bristow
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to GB9817908A priority Critical patent/GB2340679B/en
Publication of GB9817908D0 publication Critical patent/GB9817908D0/en
Publication of GB2340679A publication Critical patent/GB2340679A/en
Application granted granted Critical
Publication of GB2340679B publication Critical patent/GB2340679B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
    • H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop
    • 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
    • H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
    • H03L7/23—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop with pulse counters or frequency dividers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB9817908A 1998-08-17 1998-08-17 Frequency synthesis Expired - Fee Related GB2340679B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9817908A GB2340679B (en) 1998-08-17 1998-08-17 Frequency synthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9817908A GB2340679B (en) 1998-08-17 1998-08-17 Frequency synthesis

Publications (3)

Publication Number Publication Date
GB9817908D0 GB9817908D0 (en) 1998-10-14
GB2340679A GB2340679A (en) 2000-02-23
GB2340679B true GB2340679B (en) 2001-11-28

Family

ID=10837391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9817908A Expired - Fee Related GB2340679B (en) 1998-08-17 1998-08-17 Frequency synthesis

Country Status (1)

Country Link
GB (1) GB2340679B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1502988A (en) * 1974-04-22 1978-03-08 Philips Ltd Frequency synthesizer
GB2014003A (en) * 1977-12-23 1979-08-15 Adret Electronique Synthesizer
GB2107143A (en) * 1981-09-28 1983-04-20 Nippon Electric Co Frequency synthesizer for tranceivers
GB2278511A (en) * 1993-05-24 1994-11-30 Nec Corp Frequency synthesizers
GB2295930A (en) * 1994-12-06 1996-06-12 Motorola Ltd Frequency hopping in a TDMA system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1502988A (en) * 1974-04-22 1978-03-08 Philips Ltd Frequency synthesizer
GB2014003A (en) * 1977-12-23 1979-08-15 Adret Electronique Synthesizer
GB2107143A (en) * 1981-09-28 1983-04-20 Nippon Electric Co Frequency synthesizer for tranceivers
GB2278511A (en) * 1993-05-24 1994-11-30 Nec Corp Frequency synthesizers
GB2295930A (en) * 1994-12-06 1996-06-12 Motorola Ltd Frequency hopping in a TDMA system

Also Published As

Publication number Publication date
GB9817908D0 (en) 1998-10-14
GB2340679A (en) 2000-02-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060817