JPS56108968A - Measuring method for center frequency of narrow band irregular signal - Google Patents

Measuring method for center frequency of narrow band irregular signal

Info

Publication number
JPS56108968A
JPS56108968A JP1171380A JP1171380A JPS56108968A JP S56108968 A JPS56108968 A JP S56108968A JP 1171380 A JP1171380 A JP 1171380A JP 1171380 A JP1171380 A JP 1171380A JP S56108968 A JPS56108968 A JP S56108968A
Authority
JP
Japan
Prior art keywords
output
input signal
center frequency
measuring method
narrow band
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.)
Pending
Application number
JP1171380A
Other languages
Japanese (ja)
Inventor
Akira Kobayashi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP1171380A priority Critical patent/JPS56108968A/en
Publication of JPS56108968A publication Critical patent/JPS56108968A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To obtain a center frequency accurately by quantizing the input signal to 3-value levels in the thresholds provided vertically symmetrically with respect to the center level in a measuring method for narrow band irregular signals utilizing correlations. CONSTITUTION:Thresholds V(+) and V(-) are provided vertically symmetrically with respect to the center level of an input signal. A level discriminating circuit 1 produces a positive output when the input signal exceeds the threshold V(+) and zero output in other case, and a level discriminating circuit 1' produces a negative output when the input signal is below the threshold V(-) and zero output in other case. The outputs of the circuits 1, 1' are inputted to delay circuits 2, 2', by which they are delayed by the same time. The outputs of the circuits 1, 1' and 2, 2' are mutually ANDed by an AND circuit 3, after which they are integrated in an integrating circuit 4. Said integrated output is positive when the above-mentioned delay times are large and negative when small. Said output is so controlled as to be made zero, whereby the center frequency of the input signal is obtained.
JP1171380A 1980-02-02 1980-02-02 Measuring method for center frequency of narrow band irregular signal Pending JPS56108968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1171380A JPS56108968A (en) 1980-02-02 1980-02-02 Measuring method for center frequency of narrow band irregular signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1171380A JPS56108968A (en) 1980-02-02 1980-02-02 Measuring method for center frequency of narrow band irregular signal

Publications (1)

Publication Number Publication Date
JPS56108968A true JPS56108968A (en) 1981-08-28

Family

ID=11785675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1171380A Pending JPS56108968A (en) 1980-02-02 1980-02-02 Measuring method for center frequency of narrow band irregular signal

Country Status (1)

Country Link
JP (1) JPS56108968A (en)

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