JPS646875A - Frequency measuring instrument - Google Patents
Frequency measuring instrumentInfo
- Publication number
- JPS646875A JPS646875A JP16338987A JP16338987A JPS646875A JP S646875 A JPS646875 A JP S646875A JP 16338987 A JP16338987 A JP 16338987A JP 16338987 A JP16338987 A JP 16338987A JP S646875 A JPS646875 A JP S646875A
- Authority
- JP
- Japan
- Prior art keywords
- pulse counter
- pulse
- counter
- counted value
- cycles
- 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
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
PURPOSE:To prevent a measurement frequency from generating a ripple even when the cycles of input pulses are longer than sampling cycles by finding the measurement frequency in consideration of the number of sampling cycles wherein no pulse arrives. CONSTITUTION:A pulse counter 1 counts input pulses Vin and a clock generator 2 latches the output C0 of the pulse counter 1 at the end of each sampling cycle and clears the pulse counter 1 after the delay time of delay D1. When the counted value C0 of the pulse counter 1 is 0, a signal generator 3 generates a no-pulse signal P0 and a zero counter 4 increments its counted value S. When the counted value of the pulse counter 1 is larger than 0, on the other hand, the signal generator 3 supplies a latch signal P1 to a holding circuit 6 and a computing element 5 calculates a frequency from the outputs of the pulse counter 1 and zero counter 4 and inputs it to the holding circuit 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16338987A JPS646875A (en) | 1987-06-30 | 1987-06-30 | Frequency measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16338987A JPS646875A (en) | 1987-06-30 | 1987-06-30 | Frequency measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS646875A true JPS646875A (en) | 1989-01-11 |
Family
ID=15772957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16338987A Pending JPS646875A (en) | 1987-06-30 | 1987-06-30 | Frequency measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS646875A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04319092A (en) * | 1991-04-19 | 1992-11-10 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5848868A (en) * | 1981-09-18 | 1983-03-22 | Fuji Electric Co Ltd | Measuring method for pulse frequency |
-
1987
- 1987-06-30 JP JP16338987A patent/JPS646875A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5848868A (en) * | 1981-09-18 | 1983-03-22 | Fuji Electric Co Ltd | Measuring method for pulse frequency |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04319092A (en) * | 1991-04-19 | 1992-11-10 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
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