GB1094302A - Improvements in or relating to frequency sensing systems - Google Patents

Improvements in or relating to frequency sensing systems

Info

Publication number
GB1094302A
GB1094302A GB1048864A GB1048864A GB1094302A GB 1094302 A GB1094302 A GB 1094302A GB 1048864 A GB1048864 A GB 1048864A GB 1048864 A GB1048864 A GB 1048864A GB 1094302 A GB1094302 A GB 1094302A
Authority
GB
United Kingdom
Prior art keywords
relating
pulses
sensing systems
frequency sensing
frequency
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
GB1048864A
Inventor
Peter Augustine Coyle
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.)
Plessey UK Ltd
Original Assignee
Plessey UK 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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB1048864A priority Critical patent/GB1094302A/en
Publication of GB1094302A publication Critical patent/GB1094302A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

1,094,302. Selective signalling. PLESSEYUK. Ltd. Feb. 26, 1965 [March 12, 1964], No. 10488/64. Heading G4H. In a system for determining whether the frequency of an input train of pulses is above or below a reference frequency, relatively highfrequency clock pulses are counted for the period between two pulses of the input pulse train, and an output signal is produced in accordance with whether the count is above or below a reference count. The system is arranged that after a short delay the counter is zeroized and a further cycle effected.
GB1048864A 1964-03-12 1964-03-12 Improvements in or relating to frequency sensing systems Expired GB1094302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1048864A GB1094302A (en) 1964-03-12 1964-03-12 Improvements in or relating to frequency sensing systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1048864A GB1094302A (en) 1964-03-12 1964-03-12 Improvements in or relating to frequency sensing systems

Publications (1)

Publication Number Publication Date
GB1094302A true GB1094302A (en) 1967-12-06

Family

ID=9968771

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1048864A Expired GB1094302A (en) 1964-03-12 1964-03-12 Improvements in or relating to frequency sensing systems

Country Status (1)

Country Link
GB (1) GB1094302A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318876A1 (en) * 1973-04-11 1974-10-24 Siemens Ag FREQUENCY RELAY
DE2451571A1 (en) * 1973-10-31 1975-06-05 Gurry George William ELECTRICAL CIRCUIT FOR FEELING THE FREQUENCY OF INPUT SIGNALS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318876A1 (en) * 1973-04-11 1974-10-24 Siemens Ag FREQUENCY RELAY
DE2451571A1 (en) * 1973-10-31 1975-06-05 Gurry George William ELECTRICAL CIRCUIT FOR FEELING THE FREQUENCY OF INPUT SIGNALS

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