JPS54135577A - Frequency measuring apparatus - Google Patents
Frequency measuring apparatusInfo
- Publication number
- JPS54135577A JPS54135577A JP4368478A JP4368478A JPS54135577A JP S54135577 A JPS54135577 A JP S54135577A JP 4368478 A JP4368478 A JP 4368478A JP 4368478 A JP4368478 A JP 4368478A JP S54135577 A JPS54135577 A JP S54135577A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- comparison
- shift register
- analog signal
- measuring apparatus
- 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.)
- Granted
Links
Landscapes
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
PURPOSE: To make possible to measure the frequency of original analog signal approximately in a simple constitution, by counting the changes of increase or decrease of sample values of PCM signals.
CONSTITUTION: The input PCM signal is supplied into a shift register 6 through a shift register 5, and the sample values stored in each register are compared 7 in each sample value. The result of comparison is, depending on the size, outputted as "1" or "0". And the output of comparison is counted 9 through a gate 8 only when the control signal of terminal 10 is "1". By dividing this count values by the counting time, the frequency of the original analog signal may be obtained approximately.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4368478A JPS601585B2 (en) | 1978-04-13 | 1978-04-13 | frequency measurement device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4368478A JPS601585B2 (en) | 1978-04-13 | 1978-04-13 | frequency measurement device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54135577A true JPS54135577A (en) | 1979-10-20 |
JPS601585B2 JPS601585B2 (en) | 1985-01-16 |
Family
ID=12670660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4368478A Expired JPS601585B2 (en) | 1978-04-13 | 1978-04-13 | frequency measurement device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS601585B2 (en) |
-
1978
- 1978-04-13 JP JP4368478A patent/JPS601585B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS601585B2 (en) | 1985-01-16 |
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