GB2288931B - Frequency synthesizer - Google Patents

Frequency synthesizer

Info

Publication number
GB2288931B
GB2288931B GB9508511A GB9508511A GB2288931B GB 2288931 B GB2288931 B GB 2288931B GB 9508511 A GB9508511 A GB 9508511A GB 9508511 A GB9508511 A GB 9508511A GB 2288931 B GB2288931 B GB 2288931B
Authority
GB
United Kingdom
Prior art keywords
frequency synthesizer
synthesizer
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
GB9508511A
Other versions
GB2288931A (en
GB9508511D0 (en
Inventor
Isao Takeuchi
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB9508511D0 publication Critical patent/GB9508511D0/en
Publication of GB2288931A publication Critical patent/GB2288931A/en
Application granted granted Critical
Publication of GB2288931B publication Critical patent/GB2288931B/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
    • H03L7/08—Details of the phase-locked loop
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/087—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using at least two phase detectors or a frequency and phase detector in the loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/18—Automatic scanning over a band of frequencies
    • H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
    • H03J7/28—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element using counters or frequency dividers
    • 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
GB9508511A 1994-04-28 1995-04-26 Frequency synthesizer Expired - Fee Related GB2288931B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6092557A JPH07297713A (en) 1994-04-28 1994-04-28 Frequency synthesizer

Publications (3)

Publication Number Publication Date
GB9508511D0 GB9508511D0 (en) 1995-06-14
GB2288931A GB2288931A (en) 1995-11-01
GB2288931B true GB2288931B (en) 1998-09-23

Family

ID=14057725

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9508511A Expired - Fee Related GB2288931B (en) 1994-04-28 1995-04-26 Frequency synthesizer

Country Status (4)

Country Link
JP (1) JPH07297713A (en)
KR (1) KR100343078B1 (en)
CN (1) CN1099763C (en)
GB (1) GB2288931B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816656C2 (en) * 1998-04-15 2000-08-10 Suedwestrundfunk Anstalt Des O Method of generating frequencies
WO2000045515A1 (en) * 1999-01-29 2000-08-03 Sanyo Electric Co., Ltd. Pll apparatus and variable frequency-division device
JP5229081B2 (en) * 2009-04-10 2013-07-03 富士通株式会社 Semiconductor device
EP2571165B1 (en) * 2011-05-18 2015-10-21 Asahi Kasei Microdevices Corporation Accumulator type fractional-n pll synthesizer and control method thereof
GB2580631B (en) * 2019-01-17 2022-04-27 Cml Microcircuits Uk Ltd Phase-locked loop circuitry

Also Published As

Publication number Publication date
JPH07297713A (en) 1995-11-10
GB2288931A (en) 1995-11-01
CN1113053A (en) 1995-12-06
CN1099763C (en) 2003-01-22
GB9508511D0 (en) 1995-06-14
KR950035076A (en) 1995-12-30
KR100343078B1 (en) 2002-12-16

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Legal Events

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

Effective date: 20100426