FR2637096A1 - Circuit de commutation, notamment pour signaux d'horloge - Google Patents

Circuit de commutation, notamment pour signaux d'horloge

Info

Publication number
FR2637096A1
FR2637096A1 FR8912518A FR8912518A FR2637096A1 FR 2637096 A1 FR2637096 A1 FR 2637096A1 FR 8912518 A FR8912518 A FR 8912518A FR 8912518 A FR8912518 A FR 8912518A FR 2637096 A1 FR2637096 A1 FR 2637096A1
Authority
FR
France
Prior art keywords
switching means
clock signals
clock signal
switching
signal
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.)
Granted
Application number
FR8912518A
Other languages
English (en)
Other versions
FR2637096B1 (fr
Inventor
Yukio Utsunomiya
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.)
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
Original Assignee
Toshiba Corp
Toshiba Intelligent Technology Co Ltd
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 Toshiba Corp, Toshiba Intelligent Technology Co Ltd filed Critical Toshiba Corp
Publication of FR2637096A1 publication Critical patent/FR2637096A1/fr
Application granted granted Critical
Publication of FR2637096B1 publication Critical patent/FR2637096B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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)
  • Electronic Switches (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Circuit de commutation de signaux d'horloge caractérisé en ce que le circuit de sélection des signaux d'horloge est sélectionné entre les premier et second signaux d'horloge par le signal de commutation de fréquence, le circuit comprenant des premiers moyens de commutation 101-104 qui délivrent un premier signal d'horloge et des seconds moyens de commutation 105-107, les seconds moyens de commutation 105-107 délivrant le second signal de commutation après que les premiers moyens de commutation 101-104 ont interrompu le premier signal d'horloge et interrompt le second signal d'horloge avant que les premiers moyens de commutation 101-104 délivrent le premier signal d'horloge, le signal de sortie des seconds moyens de commutation 105-107 étant commuté en synchronisme avec le second signal d'horloge.
FR8912518A 1988-09-28 1989-09-25 Circuit de commutation, notamment pour signaux d'horloge Expired - Fee Related FR2637096B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63240713A JP2739964B2 (ja) 1988-09-28 1988-09-28 クロック切替回路

Publications (2)

Publication Number Publication Date
FR2637096A1 true FR2637096A1 (fr) 1990-03-30
FR2637096B1 FR2637096B1 (fr) 1994-12-16

Family

ID=17063602

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8912518A Expired - Fee Related FR2637096B1 (fr) 1988-09-28 1989-09-25 Circuit de commutation, notamment pour signaux d'horloge

Country Status (4)

Country Link
US (1) US5099141A (fr)
JP (1) JP2739964B2 (fr)
KR (1) KR960003062B1 (fr)
FR (1) FR2637096B1 (fr)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04287458A (ja) * 1991-03-18 1992-10-13 Fujitsu Ltd シリアルインターフェースの伝送速度制御方式およびデータ伝送を行う装置
JPH04288607A (ja) * 1991-03-18 1992-10-13 Sharp Corp クロック信号切り換え回路
US5289050A (en) * 1991-03-29 1994-02-22 Victor Company Of Japan, Ltd. Clock signal selection circuit
GB9109445D0 (en) * 1991-05-01 1991-06-26 Ncr Co A circuit for glitch-free switching of asynchronous clock sources
US5381542A (en) * 1991-07-29 1995-01-10 Unisys Corporation System for switching between a plurality of clock sources upon detection of phase alignment thereof and disabling all other clock sources
US5231636A (en) * 1991-09-13 1993-07-27 National Semiconductor Corporation Asynchronous glitchless digital MUX
US5274678A (en) * 1991-12-30 1993-12-28 Intel Corporation Clock switching apparatus and method for computer systems
US5414308A (en) * 1992-07-29 1995-05-09 Winbond Electronics Corporation High frequency clock generator with multiplexer
US5418825A (en) * 1992-09-16 1995-05-23 Texas Instruments Incorporated Time-domain boundary bridge method and apparatus
EP0602422A1 (fr) * 1992-12-15 1994-06-22 International Business Machines Corporation Changement dynamique de fréquence avec des générateurs d'horloge à division par un
US5357146A (en) * 1992-12-31 1994-10-18 At&T Bell Laboratories Glitch-free clock multiplexer
JP3425177B2 (ja) * 1993-03-24 2003-07-07 株式会社東芝 データ伝送システム
JPH06318123A (ja) * 1993-05-07 1994-11-15 Nec Ic Microcomput Syst Ltd 半導体集積回路
US5623223A (en) * 1994-10-12 1997-04-22 National Semiconductor Corporation Glitchless clock switching circuit
FR2726409B1 (fr) * 1994-10-28 1996-12-13 Suisse Electronique Microtech Multiplexeur de variables logiques
US5877636A (en) * 1996-10-18 1999-03-02 Samsung Electronics Co., Ltd. Synchronous multiplexer for clock signals
KR100562483B1 (ko) * 1998-09-04 2006-06-01 삼성전자주식회사 버스 클락 주파수 변환 방법
DE19844671C1 (de) * 1998-09-29 1999-10-07 Siemens Ag Spikefreie Taktumschaltung
US6292038B1 (en) * 1998-12-23 2001-09-18 Intel Corporation Smooth clock switching for power managed PCI adapters
US6453425B1 (en) 1999-11-23 2002-09-17 Lsi Logic Corporation Method and apparatus for switching clocks presented to synchronous SRAMs
US6642766B2 (en) * 2000-10-12 2003-11-04 Matsushita Electric Industrial Co., Ltd. Digital circuit, LSI including the same and method for removing noise
US6917608B1 (en) 2000-12-22 2005-07-12 National Semiconductor Corporation Microsequencer microcode bank switched architecture
US6963554B1 (en) 2000-12-27 2005-11-08 National Semiconductor Corporation Microwire dynamic sequencer pipeline stall
JP2003044161A (ja) * 2001-08-01 2003-02-14 Fujitsu Ltd クロック制御方法及びクロック制御回路並びにｉｃカードリード及び／又はライト装置
US6988215B2 (en) * 2001-09-14 2006-01-17 Medtronic, Inc. Method and apparatus for synchronization of clock domains
US6693477B2 (en) * 2001-10-22 2004-02-17 Research In Motion Limited Clock circuit for a microprocessor
US6900674B2 (en) * 2002-11-21 2005-05-31 Sun Microsystems, Inc. Method and circuitry for phase align detection in multi-clock domain
US7446588B2 (en) * 2003-12-11 2008-11-04 International Business Machines Corporation Highly scalable methods and apparatus for multiplexing signals
US6973155B2 (en) * 2004-03-25 2005-12-06 International Business Machines Corporation Highly scalable glitch-free frequency divider
US6980038B2 (en) * 2004-05-06 2005-12-27 International Business Machines Corporation Circuit for compensating charge leakage in a low pass filter capacitor of PLL systems
US6972604B2 (en) * 2004-05-06 2005-12-06 International Business Machines Corporation Circuit for compensating LPF capacitor charge leakage in phase locked loop systems
US7245161B2 (en) * 2005-09-15 2007-07-17 International Business Machines Corporation Apparatus and method for verifying glitch-free operation of a multiplexer
US20090315597A1 (en) * 2008-06-24 2009-12-24 Subba Reddy Kallam Clock Selection for a Communications Processor having a Sleep Mode
JP4640495B2 (ja) * 2008-11-27 2011-03-02 トヨタ自動車株式会社 電気絶縁型スイッチング素子駆動装置
FR2952770B1 (fr) * 2009-11-13 2011-11-25 Thales Sa Circuit de commutation d'horloges sans parasites
CN105406984B (zh) * 2015-10-22 2019-05-31 上海斐讯数据通信技术有限公司 一种实现主备倒换背板时钟的***及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190554A1 (fr) * 1985-02-05 1986-08-13 Siemens Aktiengesellschaft Procédé et arrangement pour la commutation d'un dispostif commandé par horloge avec plusieurs états de fonctionnement

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708686A (en) * 1970-04-30 1973-01-02 Lorain Prod Corp Frequency comparator
US4419629A (en) * 1980-06-25 1983-12-06 Sperry Corporation Automatic synchronous switch for a plurality of asynchronous oscillators
JPS59221114A (ja) * 1983-05-31 1984-12-12 Fujitsu Ltd クロツク信号切換回路
JPS59221115A (ja) * 1983-05-31 1984-12-12 Fujitsu Ltd クロツク信号切換回路
JPS6228823A (ja) * 1985-07-31 1987-02-06 Toshiba Corp 信号切換回路
JPS62229491A (ja) * 1986-03-31 1987-10-08 Toshiba Corp 携帯可能記録媒体の読取り／書込み装置
GB8615399D0 (en) * 1986-06-24 1986-07-30 Int Computers Ltd Switching circuit
JP2535848B2 (ja) * 1986-10-22 1996-09-18 ヤマハ株式会社 同期クロックの変更方法およびその装置
JPS63117514A (ja) * 1986-11-05 1988-05-21 Mitsubishi Electric Corp クロツク信号切換回路
GB2198012B (en) * 1986-11-20 1990-07-04 Sony Corp Clock signal multiplexers
US4789984A (en) * 1987-10-16 1988-12-06 American Telephone And Telegraph Company, At&T Bell Laboratories High-speed multiplexer circuit
US4988901A (en) * 1988-04-15 1991-01-29 Sharp Kabushiki Kaisha Pulse detecting device for detecting and outputting a pulse signal related to the slower frequency input pulse
US4853653A (en) * 1988-04-25 1989-08-01 Rockwell International Corporation Multiple input clock selector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190554A1 (fr) * 1985-02-05 1986-08-13 Siemens Aktiengesellschaft Procédé et arrangement pour la commutation d'un dispostif commandé par horloge avec plusieurs états de fonctionnement

Also Published As

Publication number Publication date
KR960003062B1 (ko) 1996-03-04
US5099141A (en) 1992-03-24
JPH0290308A (ja) 1990-03-29
FR2637096B1 (fr) 1994-12-16
KR900005264A (ko) 1990-04-13
JP2739964B2 (ja) 1998-04-15

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Legal Events

Date Code Title Description
ST Notification of lapse
ST Notification of lapse
RN Application for restoration
FC Decision of inpi director general to approve request for restoration