[go: up one dir, main page]

GB1071491A - Improvements in or relating to frequency meters - Google Patents

Improvements in or relating to frequency meters

Info

Publication number
GB1071491A
GB1071491A GB9718/63A GB971863A GB1071491A GB 1071491 A GB1071491 A GB 1071491A GB 9718/63 A GB9718/63 A GB 9718/63A GB 971863 A GB971863 A GB 971863A GB 1071491 A GB1071491 A GB 1071491A
Authority
GB
United Kingdom
Prior art keywords
frequency
reference frequencies
known frequency
attained
march
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
GB9718/63A
Inventor
Peter Wood
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 GB9718/63A priority Critical patent/GB1071491A/en
Publication of GB1071491A publication Critical patent/GB1071491A/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
    • G01R23/06—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage
    • G01R23/09—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into an amplitude of current or voltage using analogue integrators, e.g. capacitors establishing a mean value by balance of input signals and defined discharge signals or leakage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/60—Analogue/digital converters with intermediate conversion to frequency of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1,071,491. Selective signalling. PLESSEY-UK Ltd. March 4, 1964 [March 12, 1963], No. 9718/63. Heading G4H. In a frequency measuring system the unknown frequency is compared with a known frequency formed by selectively adding various reference frequencies, and the known frequency is progressively modified in accordance with the result of the comparison until equality is attained, the particular selection of reference frequencies necessary to achieve this being a measure of the unknown frequency. As described, pulses from a 16 kc/s. oscillator 7 Fig. 1, are successively divided by bi-stable circuits C-H to give reference frequencies of 8 kc/s., 2 kc/s. &c. These reference frequencies are selectively combined, in accordance with the contents of a counter 1 to 6 to produce a known frequency K. The input frequency is compared with the known frequency by logic circuit 15 to 24 and any difference steps the counter 1 to 6 forwards or backwards until equality is attained.
GB9718/63A 1963-03-12 1963-03-12 Improvements in or relating to frequency meters Expired GB1071491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9718/63A GB1071491A (en) 1963-03-12 1963-03-12 Improvements in or relating to frequency meters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9718/63A GB1071491A (en) 1963-03-12 1963-03-12 Improvements in or relating to frequency meters

Publications (1)

Publication Number Publication Date
GB1071491A true GB1071491A (en) 1967-06-07

Family

ID=9877437

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9718/63A Expired GB1071491A (en) 1963-03-12 1963-03-12 Improvements in or relating to frequency meters

Country Status (1)

Country Link
GB (1) GB1071491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2400285A1 (en) * 1974-01-04 1975-07-17 Philips Patentverwaltung EVALUATION DEVICE FOR FREQUENCY OR PERIOD DURATION ANALOGUE MEASUREMENT SIGNALS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2400285A1 (en) * 1974-01-04 1975-07-17 Philips Patentverwaltung EVALUATION DEVICE FOR FREQUENCY OR PERIOD DURATION ANALOGUE MEASUREMENT SIGNALS

Similar Documents

Publication Publication Date Title
GB1226592A (en)
SE323814B (en)
GB1262877A (en) Displacement measuring instrument
Jeffress et al. Masking and interaural phase: II. 167 cycles.
GB1081753A (en) Improvements in or relating to electronic circuitry for producing and remembering an output voltage that represents the level of a signal on the input
GB1071491A (en) Improvements in or relating to frequency meters
GB1105208A (en) Improvements in or relating to circuit arrangement for the production of phase-related pulse trains
GB972463A (en) Frequency generating system
GB1243594A (en) Improvements in or relating to automatic frequency controlled oscillators
IL33200A (en) Differential frequency meter
GB1124276A (en) Angle modulated wave demodulating circuits
GB1196442A (en) Signal Processing Apparatus
GB1425517A (en) Timing mode selector
GB1217545A (en) Very-low and low-frequency precision phase calibrator
OA01837A (en) Improvements to radio-electric wave receivers modulated in frequency or phase.
GB1174685A (en) A Method of Generating a Signal Characterising the Delay Time of a Signal Path and Circuit Arrangements for Performing the Method
GB1285374A (en) Improvements in or relating to temperature measurement
GB1080877A (en) Improvements in and relating to frequency measuring apparatus
GB1247240A (en) Improvements in or relating to phase measuring and monitoring circuits
Shull The development of the community art center in form and function
CARPENTER et al. Observed correlations between high frequency f-region north-scatter and npg whistler mode echo propagation
GB1094302A (en) Improvements in or relating to frequency sensing systems
GOLDSTEIN et al. Measure of equipment dependability that is related to statistical loss and is suitable for application to complex space systems
KRAUS et al. Anomalous pulse-radar ionospheric echoes associated with echo i passes, with emphasis on starting time of echoes and passage of echo i through the antenna beam
GB1215934A (en) Improvements in or relating to navigation aiding radio receivers