GB921807A - Improvements in or relating to electrical circuits - Google Patents

Improvements in or relating to electrical circuits

Info

Publication number
GB921807A
GB921807A GB4390061A GB4390061A GB921807A GB 921807 A GB921807 A GB 921807A GB 4390061 A GB4390061 A GB 4390061A GB 4390061 A GB4390061 A GB 4390061A GB 921807 A GB921807 A GB 921807A
Authority
GB
United Kingdom
Prior art keywords
stages
alarm
circuit
gates
bring
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
GB4390061A
Inventor
Francesco Ambrosino
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4390061A priority Critical patent/GB921807A/en
Publication of GB921807A publication Critical patent/GB921807A/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
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/085—Error detection or correction by redundancy in data representation, e.g. by using checking codes using codes with inherent redundancy, e.g. n-out-of-m codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

921,807. Counters; testing. STANDARD TELEPHONES & CABLES Ltd. Dec. 7, 1961, No. 43900/61. Class 106 (1). A storage circuit in which a predetermined number of stages are in true condition for the storage of any item of intelligence operates an alarm when it fails to satisfy this condition, and is characterized by means which cause the storage circuit to fail whereby the test circuit is checked. A 2-out-of-5 counter comprises five stages A-E, weighted respectively 0, 1, 2, 4, 7, the digit 0 being represented by operation of D and E. Stepping is performed by applying a TW1 pulse to all stages simultaneously. If 3 or more stages are operative at any one time one of gates G101-G110 passes a strobe pulse to operate bi-stable device Y to bring up an alarm. Alternatively if 4 or more stages are inoperative one of gates G111-G115 operates to bring up the alarm. Connectors C1-C15 are provided. Periodically all the stages of the counter are brought to state 1 and immediately after to state 0 to check the testing circuit.
GB4390061A 1961-12-07 1961-12-07 Improvements in or relating to electrical circuits Expired GB921807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4390061A GB921807A (en) 1961-12-07 1961-12-07 Improvements in or relating to electrical circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4390061A GB921807A (en) 1961-12-07 1961-12-07 Improvements in or relating to electrical circuits

Publications (1)

Publication Number Publication Date
GB921807A true GB921807A (en) 1963-03-27

Family

ID=10430847

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4390061A Expired GB921807A (en) 1961-12-07 1961-12-07 Improvements in or relating to electrical circuits

Country Status (1)

Country Link
GB (1) GB921807A (en)

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