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JPS5687827A - Spectral analyzer - Google Patents

Spectral analyzer

Info

Publication number
JPS5687827A
JPS5687827A JP16513379A JP16513379A JPS5687827A JP S5687827 A JPS5687827 A JP S5687827A JP 16513379 A JP16513379 A JP 16513379A JP 16513379 A JP16513379 A JP 16513379A JP S5687827 A JPS5687827 A JP S5687827A
Authority
JP
Japan
Prior art keywords
frequency band
given frequency
band
summing circuit
signals
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
JP16513379A
Other languages
Japanese (ja)
Inventor
Keiji Kahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16513379A priority Critical patent/JPS5687827A/en
Publication of JPS5687827A publication Critical patent/JPS5687827A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

PURPOSE:To simplify the circuit constitution of a spectral analyzer by squaring and integrating digital signals within a given frequency band and drawing out the accumulated value as a spectral component included in the given frequency band. CONSTITUTION:The input signal is converted into a digital signal by an analog/ digital converter A/D. A band-pass filter BPF allows signals within a given band to be multiplied in a squaring circuit SQ to obtain squared signals, which are applied to a summing circuit SUM. The signal about the state one sample before is drawn out of a delay element Z<-1> and applied to the summing circuit SUM to accumulate successively. From the summing circuit SUM, a spectral component included in the given frequency band is outputted.
JP16513379A 1979-12-19 1979-12-19 Spectral analyzer Pending JPS5687827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16513379A JPS5687827A (en) 1979-12-19 1979-12-19 Spectral analyzer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16513379A JPS5687827A (en) 1979-12-19 1979-12-19 Spectral analyzer

Publications (1)

Publication Number Publication Date
JPS5687827A true JPS5687827A (en) 1981-07-16

Family

ID=15806520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16513379A Pending JPS5687827A (en) 1979-12-19 1979-12-19 Spectral analyzer

Country Status (1)

Country Link
JP (1) JPS5687827A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213115A (en) * 1985-07-03 1987-01-21 ジ−メンス・アクチエンゲゼルシヤフト Digital demultiplexing filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6213115A (en) * 1985-07-03 1987-01-21 ジ−メンス・アクチエンゲゼルシヤフト Digital demultiplexing filter

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