GB1118474A - Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses - Google Patents

Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses

Info

Publication number
GB1118474A
GB1118474A GB2530767A GB2530767A GB1118474A GB 1118474 A GB1118474 A GB 1118474A GB 2530767 A GB2530767 A GB 2530767A GB 2530767 A GB2530767 A GB 2530767A GB 1118474 A GB1118474 A GB 1118474A
Authority
GB
United Kingdom
Prior art keywords
counter
pulses
pulse rate
state
input
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
GB2530767A
Inventor
David Arthur Walker
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce 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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB2530767A priority Critical patent/GB1118474A/en
Publication of GB1118474A publication Critical patent/GB1118474A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/02—Input circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/482—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by nuclear radiation detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nuclear Medicine (AREA)

Abstract

1,118,474. Frequency discriminators. ROLLS-ROYCE Ltd. 1 June, 1967, No. 25307/67. Heading H3A. [Also in Division G1] Periodic variations in the pulse rate of a pulse train having a constant average frequency are detected by comparing the pulse rate with that of a train of clock pulses, to produce an output signal if consecutively the clock pulse rate exceeds the varying pulse rate and the varying pulse rate exceeds the clock pulse rate. Assume initially bi-stable circuits 60, 110 are in their " 1 " state, then the next clock pulse switches bi-stable circuit 60 to its " 0 " state. The next pulse on input 32 switches bi-stable circuit 60 back to its " 1 " state, and is also fed via AND gate 54 to one input 68 of AND gate 70. The other input 66 still receives a " 0 " due to delay 64, so that no signal is passed to counter 102. Subsequent pulses at 32 have no effect on bistable circuit 60, but they pass through AND gates 54, 70 and are counted in counter 102 until the next clock pulse switches bi-stable circuit 60 into its " 0 " state and closes gate 70. The above procedure is repeated until the counter 102 reaches a predetermined count and switches bi-stable circuit 110 to its " 0 " state, resetting the counter. Gate 80 is now enabled, and the roles of the clock pulses and the other pulses are reversed, with the counter counting the number of clock pulses occurring between pulses at input 32. The input signal applied to 32 is derived from a scintillation counter positioned near a rotary bearing which includes a radioactive roller, Fig. 1 (not shown).
GB2530767A 1967-06-01 1967-06-01 Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses Expired GB1118474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2530767A GB1118474A (en) 1967-06-01 1967-06-01 Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2530767A GB1118474A (en) 1967-06-01 1967-06-01 Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses

Publications (1)

Publication Number Publication Date
GB1118474A true GB1118474A (en) 1968-07-03

Family

ID=10225589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2530767A Expired GB1118474A (en) 1967-06-01 1967-06-01 Circuit for detecting periodic variations superimposed upon a train of otherwise randomly distributed pulses

Country Status (1)

Country Link
GB (1) GB1118474A (en)

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