DK351288A - Apparat til dynamisk omskiftning af taktkilde i et databehandlingssystem - Google Patents

Apparat til dynamisk omskiftning af taktkilde i et databehandlingssystem

Info

Publication number
DK351288A
DK351288A DK351288A DK351288A DK351288A DK 351288 A DK351288 A DK 351288A DK 351288 A DK351288 A DK 351288A DK 351288 A DK351288 A DK 351288A DK 351288 A DK351288 A DK 351288A
Authority
DK
Denmark
Prior art keywords
data processing
processing system
source change
dynamic roof
roof source
Prior art date
Application number
DK351288A
Other languages
Danish (da)
English (en)
Other versions
DK351288D0 (da
Inventor
Jaime Calle
Original Assignee
Honeywell Bull
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 Honeywell Bull filed Critical Honeywell Bull
Publication of DK351288D0 publication Critical patent/DK351288D0/da
Publication of DK351288A publication Critical patent/DK351288A/da

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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)
  • Hardware Redundancy (AREA)
  • Multi Processors (AREA)
  • Information Transfer Systems (AREA)
  • Electric Clocks (AREA)
DK351288A 1987-06-26 1988-06-24 Apparat til dynamisk omskiftning af taktkilde i et databehandlingssystem DK351288A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/066,689 US4823262A (en) 1987-06-26 1987-06-26 Apparatus for dynamically switching the clock source of a data processing system

Publications (2)

Publication Number Publication Date
DK351288D0 DK351288D0 (da) 1988-06-24
DK351288A true DK351288A (da) 1988-12-27

Family

ID=22071061

Family Applications (1)

Application Number Title Priority Date Filing Date
DK351288A DK351288A (da) 1987-06-26 1988-06-24 Apparat til dynamisk omskiftning af taktkilde i et databehandlingssystem

Country Status (8)

Country Link
US (1) US4823262A (de)
EP (1) EP0296617B1 (de)
AU (1) AU596013B2 (de)
CA (1) CA1302583C (de)
DE (1) DE3852721T2 (de)
DK (1) DK351288A (de)
ES (1) ES2066773T3 (de)
NO (1) NO882795L (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133064A (en) * 1987-04-27 1992-07-21 Hitachi, Ltd. Data processing system generating clock signal from an input clock, phase locked to the input clock and used for clocking logic devices
JPH0276056A (ja) * 1988-09-13 1990-03-15 Toshiba Corp 情報処理装置
US6727903B1 (en) 1989-04-20 2004-04-27 Hitachi, Ltd. Microprocessor, and graphics processing apparatus and method using the same
JPH02278475A (ja) * 1989-04-20 1990-11-14 Hitachi Ltd 図形処理装置およびその使用方法ならびにマイクロプロセッサ
US5220661A (en) * 1989-09-15 1993-06-15 Digital Equipment Corporation System and method for reducing timing channels in digital data processing systems
US5313619A (en) * 1991-05-16 1994-05-17 Gerard J. Severance External clock unit for a computer
WO1992007316A1 (en) * 1990-10-12 1992-04-30 Intel Corporation Dynamically switchable multi-frequency clock generator
GB2252432B (en) * 1991-02-01 1994-09-28 Intel Corp Method and apparatus for operating a computer bus using selectable clock frequencies
EP0602422A1 (de) * 1992-12-15 1994-06-22 International Business Machines Corporation Dynamische Frequenzversetzung mit einem durch eins teilenden Taktgenerator
US5517638A (en) * 1993-05-13 1996-05-14 Texas Instruments Incorporated Dynamic clock switching circuitry and method
US5406061A (en) * 1993-06-19 1995-04-11 Opticon Inc. Bar code scanner operable at different frequencies
US5649177A (en) * 1993-06-21 1997-07-15 International Business Machines Corporation Control logic for very fast clock speeds
US5479648A (en) * 1994-08-30 1995-12-26 Stratus Computer, Inc. Method and apparatus for switching clock signals in a fault-tolerant computer system
US5604452A (en) * 1995-04-03 1997-02-18 Exar Corporation Clock generator using a state machine to switch between two offset clocks
US5659789A (en) * 1995-12-15 1997-08-19 Compaq Computer Corporation Stopclock toggle system for powering two CPUs from a regulator only sized for one CPU
US6055362A (en) * 1996-03-29 2000-04-25 Bull Hn Information Systems Inc. Apparatus for phase synchronizing clock signals in a fully redundant computer system
US6718474B1 (en) 2000-09-21 2004-04-06 Stratus Technologies Bermuda Ltd. Methods and apparatus for clock management based on environmental conditions
US7308592B2 (en) * 2005-02-11 2007-12-11 International Business Machines Corporation Redundant oscillator distribution in a multi-processor server system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648252A (en) * 1969-11-03 1972-03-07 Honeywell Inc Multiprogrammable, multiprocessor computer system
US3715729A (en) * 1971-03-10 1973-02-06 Ibm Timing control for a multiprocessor system
JPS56111928A (en) * 1980-02-07 1981-09-04 Nec Corp Clock source switching system
US4354229A (en) * 1980-03-10 1982-10-12 International Business Machines Corporation Loop initialization mechanism for a peer-to-peer communication system
US4468734A (en) * 1982-03-26 1984-08-28 International Business Machines Corporation Method of purging erroneous signals from closed ring data communication networks capable of repeatedly circulating such signals
US4677433A (en) * 1983-02-16 1987-06-30 Daisy Systems Corporation Two-speed clock scheme for co-processors
US4709347A (en) * 1984-12-17 1987-11-24 Honeywell Inc. Method and apparatus for synchronizing the timing subsystems of the physical modules of a local area network
US4703421A (en) * 1986-01-03 1987-10-27 Gte Communication Systems Corporation Ready line synchronization circuit for use in a duplicated computer system

Also Published As

Publication number Publication date
CA1302583C (en) 1992-06-02
AU1830788A (en) 1989-01-05
EP0296617A3 (en) 1990-06-13
DE3852721D1 (de) 1995-02-23
AU596013B2 (en) 1990-04-12
EP0296617B1 (de) 1995-01-11
NO882795D0 (no) 1988-06-23
NO882795L (no) 1988-12-27
DK351288D0 (da) 1988-06-24
ES2066773T3 (es) 1995-03-16
US4823262A (en) 1989-04-18
DE3852721T2 (de) 1995-08-24
EP0296617A2 (de) 1988-12-28

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment