GB2332577B - Generation of a stable reference clock frequency from a base clock frequency that may vary depending on source - Google Patents

Generation of a stable reference clock frequency from a base clock frequency that may vary depending on source

Info

Publication number
GB2332577B
GB2332577B GB9812646A GB9812646A GB2332577B GB 2332577 B GB2332577 B GB 2332577B GB 9812646 A GB9812646 A GB 9812646A GB 9812646 A GB9812646 A GB 9812646A GB 2332577 B GB2332577 B GB 2332577B
Authority
GB
United Kingdom
Prior art keywords
clock frequency
generation
source
vary depending
stable reference
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 - Lifetime
Application number
GB9812646A
Other languages
English (en)
Other versions
GB2332577A (en
GB9812646D0 (en
Inventor
Jeffrey Roy Dwork
Ching Yu
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.)
Advanced Micro Devices Inc
Original Assignee
Advanced Micro Devices Inc
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 Advanced Micro Devices Inc filed Critical Advanced Micro Devices Inc
Publication of GB9812646D0 publication Critical patent/GB9812646D0/en
Publication of GB2332577A publication Critical patent/GB2332577A/en
Application granted granted Critical
Publication of GB2332577B publication Critical patent/GB2332577B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/08—Clock generators with changeable or programmable clock frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Information Transfer Systems (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB9812646A 1997-12-12 1998-06-11 Generation of a stable reference clock frequency from a base clock frequency that may vary depending on source Expired - Lifetime GB2332577B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/989,986 US6070248A (en) 1997-12-12 1997-12-12 Generation of a stable reference clock frequency from a base clock frequency that may vary depending on source

Publications (3)

Publication Number Publication Date
GB9812646D0 GB9812646D0 (en) 1998-08-12
GB2332577A GB2332577A (en) 1999-06-23
GB2332577B true GB2332577B (en) 1999-10-27

Family

ID=25535628

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9812646A Expired - Lifetime GB2332577B (en) 1997-12-12 1998-06-11 Generation of a stable reference clock frequency from a base clock frequency that may vary depending on source

Country Status (3)

Country Link
US (1) US6070248A (https=)
JP (1) JPH11184555A (https=)
GB (1) GB2332577B (https=)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311284B1 (en) * 1999-03-15 2001-10-30 Advanced Micro Devices, Inc. Using an independent clock to coordinate access to registers by a peripheral device and a host system
JP4390353B2 (ja) * 2000-04-12 2009-12-24 株式会社ルネサステクノロジ クロック生成方法およびクロック生成回路
US6470032B2 (en) * 2001-03-20 2002-10-22 Alloptic, Inc. System and method for synchronizing telecom-related clocks in ethernet-based passive optical access network
JP2002328743A (ja) * 2001-05-07 2002-11-15 Oki Electric Ind Co Ltd クロック信号発生回路
TW561353B (en) * 2002-02-05 2003-11-11 Via Tech Inc Automatic reset signal generator integrated into chipset and chipset with reset completion indication function
US7844690B1 (en) 2003-01-24 2010-11-30 Douglas Durham Systems and methods for creation and use of a virtual protocol analyzer
US7804852B1 (en) * 2003-01-24 2010-09-28 Douglas Durham Systems and methods for definition and use of a common time base in multi-protocol environments
US7471753B2 (en) * 2005-02-01 2008-12-30 Credence Systems Corporation Serializer clock synthesizer
US8164368B2 (en) 2005-04-19 2012-04-24 Micron Technology, Inc. Power savings mode for memory systems
US8089318B2 (en) 2008-10-17 2012-01-03 Marvell World Trade Ltd. Methods, algorithms, circuits, and systems for determining a reference clock frequency and/or locking a loop oscillator
CN104426645A (zh) * 2013-09-02 2015-03-18 华为技术有限公司 确定以太时钟源的方法和装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246455A (en) * 1990-07-23 1992-01-29 Philips Electronic Associated Altering the rate at which digital circuitry operates
EP0721157A1 (en) * 1994-12-12 1996-07-10 Advanced Micro Devices, Inc. Microprocessor with selectable clock frequency

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5095280A (en) * 1990-11-26 1992-03-10 Integrated Circuit Systems, Inc. Dual dot clock signal generator
US5794021A (en) * 1994-11-02 1998-08-11 Advanced Micro Devices, Inc. Variable frequency clock generation circuit using aperiodic patterns
US5771373A (en) * 1994-12-22 1998-06-23 Texas Instruments Incorporated Power management masked clock circuitry, systems and methods
US5903746A (en) * 1996-11-04 1999-05-11 Texas Instruments Incorporated Apparatus and method for automatically sequencing clocks in a data processing system when entering or leaving a low power state
US5790609A (en) * 1996-11-04 1998-08-04 Texas Instruments Incorporated Apparatus for cleanly switching between various clock sources in a data processing system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246455A (en) * 1990-07-23 1992-01-29 Philips Electronic Associated Altering the rate at which digital circuitry operates
EP0721157A1 (en) * 1994-12-12 1996-07-10 Advanced Micro Devices, Inc. Microprocessor with selectable clock frequency

Also Published As

Publication number Publication date
US6070248A (en) 2000-05-30
JPH11184555A (ja) 1999-07-09
GB2332577A (en) 1999-06-23
GB9812646D0 (en) 1998-08-12

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20180610