BE889373A - Circuit de selection d'horloge - Google Patents
Circuit de selection d'horlogeInfo
- Publication number
- BE889373A BE889373A BE2/59237A BE2059237A BE889373A BE 889373 A BE889373 A BE 889373A BE 2/59237 A BE2/59237 A BE 2/59237A BE 2059237 A BE2059237 A BE 2059237A BE 889373 A BE889373 A BE 889373A
- Authority
- BE
- Belgium
- Prior art keywords
- selection circuit
- clock selection
- clock
- circuit
- selection
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1604—Error detection or correction of the data by redundancy in hardware where the fault affects the clock signals of a processing unit and the redundancy is at or within the level of clock signal generation hardware
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
- H04J3/0688—Change of the master or reference, e.g. take-over or failure of the master
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/182,871 US4322580A (en) | 1980-09-02 | 1980-09-02 | Clock selection circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
BE889373A true BE889373A (fr) | 1981-10-16 |
Family
ID=22670412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE2/59237A BE889373A (fr) | 1980-09-02 | 1981-06-25 | Circuit de selection d'horloge |
Country Status (4)
Country | Link |
---|---|
US (1) | US4322580A (fr) |
BE (1) | BE889373A (fr) |
CA (1) | CA1161935A (fr) |
IT (1) | IT1138540B (fr) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4920540A (en) * | 1987-02-25 | 1990-04-24 | Stratus Computer, Inc. | Fault-tolerant digital timing apparatus and method |
US4490581A (en) * | 1982-09-30 | 1984-12-25 | Gte Automatic Electric Labs Inc. | Clock selection control circuit |
US4538272A (en) * | 1983-12-22 | 1985-08-27 | Gte Automatic Electric Incorporated | Prioritized clock selection circuit |
US4825407A (en) * | 1984-07-26 | 1989-04-25 | Miles Inc. | Method and circuit for controlling single chip microcomputer |
US4653054A (en) * | 1985-04-12 | 1987-03-24 | Itt Corporation | Redundant clock combiner |
US4667328A (en) * | 1985-04-29 | 1987-05-19 | Mieczyslaw Mirowski | Clocking circuit with back-up clock source |
GB2178926A (en) * | 1985-08-09 | 1987-02-18 | Plessey Co Plc | Clock signal selection and security arrangements |
US5020024A (en) * | 1987-01-16 | 1991-05-28 | Stratus Computer, Inc. | Method and apparatus for detecting selected absence of digital logic synchronism |
DE3784496T2 (de) * | 1987-06-11 | 1993-09-16 | Ibm | Taktgeneratorsystem. |
US4882738A (en) * | 1987-06-25 | 1989-11-21 | Nec Corporation | Clock control system |
US4899351A (en) * | 1988-07-18 | 1990-02-06 | Western Digital Corporation | Transient free clock switch logic |
US4979191A (en) * | 1989-05-17 | 1990-12-18 | The Boeing Company | Autonomous N-modular redundant fault tolerant clock system |
JP2676966B2 (ja) * | 1990-03-16 | 1997-11-17 | 日本電気株式会社 | シングルチップマイクロコンピュータ |
US5134703A (en) * | 1990-06-11 | 1992-07-28 | Nemonix, Inc. | External clock unit for a computer |
US5155841A (en) * | 1990-09-24 | 1992-10-13 | Nemonix, Inc. | External clock unit for a computer |
WO1992007316A1 (fr) * | 1990-10-12 | 1992-04-30 | Intel Corporation | Generateur d'horloge a plusieurs frequences commutable de maniere dynamique |
CA2059143C (fr) * | 1991-01-25 | 2000-05-16 | Takeshi Miyao | Unite de traitement pour ordinateur et ordinateur comportant cette unite |
GB2269249B (en) * | 1992-07-30 | 1995-11-01 | Acorn Computers Ltd | Integrated circuit clock speed control |
JPH0778039A (ja) * | 1993-09-08 | 1995-03-20 | Fujitsu Ltd | クロック選択制御方式 |
JPH0816276A (ja) * | 1994-06-30 | 1996-01-19 | Mitsubishi Denki Semiconductor Software Kk | マイクロコンピュータ |
US5689643A (en) * | 1994-12-09 | 1997-11-18 | O'hanlan; Thomas B. | Communication device for transmitting asynchronous formatted data synchronously |
KR100303073B1 (ko) * | 1995-05-11 | 2001-11-02 | 칼 하인쯔 호르닝어 | 동적 레지스터를 사용한 cmos 회로용 클럭 신호 발생 장치 |
US5568097A (en) * | 1995-09-25 | 1996-10-22 | International Business Machines Inc. | Ultra high availability clock chip |
US5799177A (en) * | 1997-01-03 | 1998-08-25 | Intel Corporation | Automatic external clock detect and source select circuit |
US6718474B1 (en) | 2000-09-21 | 2004-04-06 | Stratus Technologies Bermuda Ltd. | Methods and apparatus for clock management based on environmental conditions |
US8116321B2 (en) * | 2004-06-16 | 2012-02-14 | Thomson Licensing | System and method for routing asynchronous signals |
EP1756988B1 (fr) * | 2004-06-16 | 2011-01-05 | Thomson Licensing | Systeme et procede d'acheminement de signaux asynchrones |
WO2009107108A1 (fr) * | 2008-02-28 | 2009-09-03 | Nxp B.V. | Circuits et procédés de commutation de signaux d'horloge |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1295627B (de) * | 1967-01-25 | 1969-05-22 | Siemens Ag | Schaltungsanordnung zur UEberwachung von Taktgebern |
US3803568A (en) * | 1973-04-06 | 1974-04-09 | Gte Automatic Electric Lab Inc | System clock for electronic communication systems |
-
1980
- 1980-09-02 US US06/182,871 patent/US4322580A/en not_active Expired - Lifetime
-
1981
- 1981-06-05 CA CA000379099A patent/CA1161935A/fr not_active Expired
- 1981-06-25 BE BE2/59237A patent/BE889373A/fr not_active IP Right Cessation
- 1981-08-31 IT IT23697/81A patent/IT1138540B/it active
Also Published As
Publication number | Publication date |
---|---|
IT8123697A0 (it) | 1981-08-31 |
US4322580A (en) | 1982-03-30 |
CA1161935A (fr) | 1984-02-07 |
IT1138540B (it) | 1986-09-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC. Effective date: 19890630 |