JPS5547457A - Detecting device for frequency of fundamental wave - Google Patents
Detecting device for frequency of fundamental waveInfo
- 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
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measuring Frequencies, Analyzing Spectra (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
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) |
-
1978
- 1978-09-30 JP JP12079078A patent/JPS5547457A/en active Pending
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