JPS5547457A - Detecting device for frequency of fundamental wave - Google Patents

Detecting device for frequency of fundamental wave

Info

Publication number
JPS5547457A
JPS5547457A JP12079078A JP12079078A JPS5547457A JP S5547457 A JPS5547457 A JP S5547457A JP 12079078 A JP12079078 A JP 12079078A JP 12079078 A JP12079078 A JP 12079078A JP S5547457 A JPS5547457 A JP S5547457A
Authority
JP
Japan
Prior art keywords
frequency
output
fundamental wave
circuit
detecting
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
JP12079078A
Other languages
Japanese (ja)
Inventor
Motoi Yagi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12079078A priority Critical patent/JPS5547457A/en
Publication of JPS5547457A publication Critical patent/JPS5547457A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To find the frequency of fundamental wave from the signal that contains many higher harmonics by detecting the peak of periodic input signal wave form, by sample-holding and rectifying its output.
CONSTITUTION: The signal to be detected, which contains many higher harmonics, is fed to the peak value detecting circuit 1 to detect the peak value. Its output is provided to the octave separating circuit 3 as a band discriminator. The output of octave separating circuit is fed to the frequency detecting circuits 4aW4n, the light emission diode 39W42 corresponding to the frequency band to which the fundamental wave belongs is lighted. An erred detection can be prevented by checking the frequency detection output by means of an output of the OR circuit 43.
COPYRIGHT: (C)1980,JPO&Japio
JP12079078A 1978-09-30 1978-09-30 Detecting device for frequency of fundamental wave Pending JPS5547457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12079078A JPS5547457A (en) 1978-09-30 1978-09-30 Detecting device for frequency of fundamental wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12079078A JPS5547457A (en) 1978-09-30 1978-09-30 Detecting device for frequency of fundamental wave

Publications (1)

Publication Number Publication Date
JPS5547457A true JPS5547457A (en) 1980-04-03

Family

ID=14795055

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12079078A Pending JPS5547457A (en) 1978-09-30 1978-09-30 Detecting device for frequency of fundamental wave

Country Status (1)

Country Link
JP (1) JPS5547457A (en)

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