GB1238582A - - Google Patents

Info

Publication number
GB1238582A
GB1238582A GB1238582DA GB1238582A GB 1238582 A GB1238582 A GB 1238582A GB 1238582D A GB1238582D A GB 1238582DA GB 1238582 A GB1238582 A GB 1238582A
Authority
GB
United Kingdom
Prior art keywords
phase
oscillator
output
counters
outputs
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
Application number
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 filed Critical
Publication of GB1238582A publication Critical patent/GB1238582A/en
Expired legal-status Critical Current

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
    • 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
    • G06F11/18—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

1,238,582. Phase lock systems. MARCONI CO. Ltd. 2 March, 1970 [15 Aug., 1969], No. 40847/69. Heading H3A. A clock oscillator arrangement in which the outputs from a group of individual oscillators 1, 2, 3 are subjected to " majority voting " to select that output which has a phase between those of the other oscillators, is characterized in that means 10, 11 are provided to compare the phase of the output of each oscillator with that of the selected output to produce a phase control signal for the respective oscillator. As described control signals, indicative of phase lead or lag switch the oscillator circuit capacitance to change the frequency. In order to indicate that an oscillator has gone outside the look in range the " lead " and " lag " control signals also open gates 19, 20 to apply input pulses to counters 22, 30. If these counters are not reset by an opposite type of control signal before a predetermined count is reached, signals from their outputs are applied to indicators connected to terminals 24, 32.
GB1238582D 1969-08-15 1969-08-15 Expired GB1238582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4084769 1969-08-15

Publications (1)

Publication Number Publication Date
GB1238582A true GB1238582A (en) 1971-07-07

Family

ID=10416919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238582D Expired GB1238582A (en) 1969-08-15 1969-08-15

Country Status (2)

Country Link
DE (1) DE2040037C3 (en)
GB (1) GB1238582A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396453A1 (en) * 1977-06-30 1979-01-26 Int Standard Electric Corp CENTRAL CLOCK

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938043A1 (en) * 1979-09-20 1981-04-09 Siemens AG, 1000 Berlin und 8000 München High accuracy redundant clock signal supplying circuit - uses majority decision circuits and several regulated clock generators
DE3924907A1 (en) * 1989-07-27 1991-01-31 Siemens Ag REDUNDANT CLOCK ARRANGEMENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396453A1 (en) * 1977-06-30 1979-01-26 Int Standard Electric Corp CENTRAL CLOCK

Also Published As

Publication number Publication date
DE2040037C3 (en) 1979-06-28
DE2040037B2 (en) 1978-11-09
DE2040037A1 (en) 1971-02-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee