CA2263402A1 - Method for keeping accurate time in a computer system - Google Patents

Method for keeping accurate time in a computer system Download PDF

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Publication number
CA2263402A1
CA2263402A1 CA002263402A CA2263402A CA2263402A1 CA 2263402 A1 CA2263402 A1 CA 2263402A1 CA 002263402 A CA002263402 A CA 002263402A CA 2263402 A CA2263402 A CA 2263402A CA 2263402 A1 CA2263402 A1 CA 2263402A1
Authority
CA
Canada
Prior art keywords
value
time
clock value
processor
external clock
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.)
Abandoned
Application number
CA002263402A
Other languages
English (en)
French (fr)
Inventor
Hossein Moiin
Robert L. Jardine
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.)
Tandem Computers Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2263402A1 publication Critical patent/CA2263402A1/en
Abandoned 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
    • G06F1/14—Time supervision arrangements, e.g. real time clock
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R40/00—Correcting the clock frequency
    • G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Clocks (AREA)
CA002263402A 1996-08-08 1997-08-07 Method for keeping accurate time in a computer system Abandoned CA2263402A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/694,073 1996-08-08
US08/694,073 US5826066A (en) 1996-08-08 1996-08-08 Method for keeping accurate time in a computer system
PCT/US1997/013909 WO1998006021A1 (en) 1996-08-08 1997-08-07 Method for keeping accurate time in a computer system

Publications (1)

Publication Number Publication Date
CA2263402A1 true CA2263402A1 (en) 1998-02-12

Family

ID=24787297

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002263402A Abandoned CA2263402A1 (en) 1996-08-08 1997-08-07 Method for keeping accurate time in a computer system

Country Status (5)

Country Link
US (1) US5826066A (enExample)
EP (1) EP0976018A1 (enExample)
JP (1) JP2000517075A (enExample)
CA (1) CA2263402A1 (enExample)
WO (1) WO1998006021A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210153156A1 (en) * 2014-03-24 2021-05-20 Imagination Technologies Limited High definition timing synchronisation function
US12468292B2 (en) * 2018-01-03 2025-11-11 Tata Consultancy Services Limited Method and system for synchronizing plurality of events in an assembly line

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* Cited by examiner, † Cited by third party
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US5958060A (en) * 1998-01-02 1999-09-28 General Electric Company Method and apparatus for clock control and synchronization
US6125162A (en) * 1998-08-20 2000-09-26 Pitney Bowes Inc. Postage meter having non-Gregorian calendar capability
US20020026321A1 (en) * 1999-02-26 2002-02-28 Sadeg M. Faris Internet-based system and method for fairly and securely enabling timed-constrained competition using globally time-sychronized client subsystems and information servers having microsecond client-event resolution
US6728880B1 (en) * 1999-09-17 2004-04-27 Adobe Systems Incorporated Secure time on computers with insecure clocks
AU2001261711A1 (en) * 2000-05-20 2001-12-03 Equipe Communications Corporation Time synchronization within a distributed processing system
US6760764B1 (en) * 2000-08-09 2004-07-06 Alcatel Canada Inc. Real time stamp distribution
DE50110332D1 (de) * 2001-03-15 2006-08-10 Siemens Ag RDS-TMC-Rundfunkempfänger und Verfahren zum Kalibrieren eines internen Zeitgebers in einem Rundfunkempfänger
US20060069429A1 (en) * 2001-04-24 2006-03-30 Spence Paul A Tissue fastening systems and methods utilizing magnetic guidance
US7555364B2 (en) * 2001-08-22 2009-06-30 MMI Controls, L.P. Adaptive hierarchy usage monitoring HVAC control system
JP3563721B2 (ja) * 2001-09-21 2004-09-08 株式会社東芝 情報処理装置および同装置で使用される時計表示制御方法
US20030126447A1 (en) * 2001-12-27 2003-07-03 Jacques Debiez Trusted high stability time source
US6639957B2 (en) * 2002-02-14 2003-10-28 Itron, Inc. Method and system for calibrating an oscillator circuit using a network based time reference
EP1478092B1 (de) * 2003-05-14 2007-11-14 Tektronix International Sales GmbH Digitaler Zähler
US7564809B1 (en) * 2004-05-06 2009-07-21 Cornell Research Foundation, Inc. Event-synchronization protocol for parallel simulation of large-scale wireless networks
US7266714B2 (en) * 2004-06-15 2007-09-04 Dolby Laboratories Licensing Corporation Method an apparatus for adjusting the time of a clock if it is determined that the degree of adjustment is within a limit based on the clocks initial time
US7228243B2 (en) * 2005-09-22 2007-06-05 International Business Machines Corporation Implementing a high resolution monotonic system clock
US20090257321A1 (en) * 2008-04-14 2009-10-15 Gary Lee Scott Dithering control of oscillator frequency to reduce cumulative timing error in a clock
EP2369438B1 (en) * 2010-02-24 2014-02-26 Fujitsu Semiconductor Limited Calibration method of a real time clock signal
US8645746B2 (en) 2010-12-03 2014-02-04 International Business Machines Corporation Cable redundancy and failover for multi-lane PCI express IO interconnections
US8677176B2 (en) 2010-12-03 2014-03-18 International Business Machines Corporation Cable redundancy and failover for multi-lane PCI express IO interconnections
US8578200B2 (en) * 2011-04-14 2013-11-05 International Business Machines Corporation Conversion of timestamps between multiple entities within a computing system
US9292712B2 (en) 2012-09-28 2016-03-22 St-Ericsson Sa Method and apparatus for maintaining secure time
US11487871B2 (en) * 2015-01-31 2022-11-01 San Diego Gas & Electric Company Methods and systems for detecting and defending against invalid time signals
CN104821820B (zh) * 2015-03-27 2017-11-17 深圳市振邦智能科技有限公司 一种定时时间的补偿方法
US9861756B1 (en) * 2016-03-08 2018-01-09 Verily Life Sciences Llc Apparatus and methods for tracking administering of medication by syringe
US10869967B2 (en) 2017-01-06 2020-12-22 Verily Life Sciences Llc Rigid sensor stopper for use in drug delivery devices
US10732270B2 (en) 2017-03-08 2020-08-04 Verily Life Sciences Llc Drug cartridge with acoustic reflector
US10592662B1 (en) * 2017-09-13 2020-03-17 Ca, Inc. Systems and methods for altering time data
US10993696B2 (en) 2017-12-08 2021-05-04 Verily Life Sciences Llc Multiple transducer injection measurement
US11197962B2 (en) 2018-02-26 2021-12-14 Verily Life Sciences Llc Waveform reconstruction for ultrasound time of flight measurements
US11714737B2 (en) * 2021-01-21 2023-08-01 Hewlett Packard Enterprise Development Lp Time clock quality determination

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575848A (en) * 1984-02-01 1986-03-11 Westinghouse Electric Corp. Methods and apparatus for correcting a software clock from an accurate clock
EP0223031A3 (en) * 1985-11-18 1990-04-04 International Business Machines Corporation Clock synchronisation in a distributed processing system
US4746920A (en) * 1986-03-28 1988-05-24 Tandem Computers Incorporated Method and apparatus for clock management
US5530846A (en) * 1993-12-29 1996-06-25 International Business Machines Corporation System for decoupling clock amortization from clock synchronization
JPH07253826A (ja) * 1994-03-16 1995-10-03 Toshiba Corp 時刻合わせ装置
US5526515A (en) * 1994-06-30 1996-06-11 Taligent, Inc. Hardware-driven clock with object-oriented interface

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210153156A1 (en) * 2014-03-24 2021-05-20 Imagination Technologies Limited High definition timing synchronisation function
US12468292B2 (en) * 2018-01-03 2025-11-11 Tata Consultancy Services Limited Method and system for synchronizing plurality of events in an assembly line

Also Published As

Publication number Publication date
JP2000517075A (ja) 2000-12-19
US5826066A (en) 1998-10-20
EP0976018A1 (en) 2000-02-02
WO1998006021A1 (en) 1998-02-12

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