JPS55113963A - Device for preventing flicker of frequency counter display - Google Patents
Device for preventing flicker of frequency counter displayInfo
- Publication number
- JPS55113963A JPS55113963A JP2218779A JP2218779A JPS55113963A JP S55113963 A JPS55113963 A JP S55113963A JP 2218779 A JP2218779 A JP 2218779A JP 2218779 A JP2218779 A JP 2218779A JP S55113963 A JPS55113963 A JP S55113963A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- value
- gate signal
- frequency
- down counter
- 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 eliminate the flicker of measured counted value of a frequency counter to measure the constant frequency input by displaying the value counted previously when the difference between the value counted previously and the value counted next is less than predetermined value.
CONSTITUTION: While first gate signal b is applied to an up-down counter, the up counter 5 counts the input signal, while the down counter 10 counts down it. If the input signal frequency does not alter, the content of the down counter 10 becomes "1", "0" or "-1" at the end of the counting period. Therefore, the output of a comparator 12 is held at low level. Thus, a D flip-flop 12 is not set, a latch timing gate 9 is not opened even at the time of second gate signal c, and the content of the latch circuit 7 is not altered. Accordingly, the indication on an indicator 6 is not altered. Next counting period is completely prepared by a third gate signal d.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2218779A JPS55113963A (en) | 1979-02-26 | 1979-02-26 | Device for preventing flicker of frequency counter display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2218779A JPS55113963A (en) | 1979-02-26 | 1979-02-26 | Device for preventing flicker of frequency counter display |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55113963A true JPS55113963A (en) | 1980-09-02 |
Family
ID=12075782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2218779A Pending JPS55113963A (en) | 1979-02-26 | 1979-02-26 | Device for preventing flicker of frequency counter display |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55113963A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58148524A (en) * | 1982-02-26 | 1983-09-03 | Nippon Seiki Co Ltd | Pulse counting system |
JPS58148523A (en) * | 1982-02-26 | 1983-09-03 | Nippon Seiki Co Ltd | Pulse counting system |
JPS58170223A (en) * | 1982-03-31 | 1983-10-06 | Nippon Seiki Co Ltd | Pulse count system |
-
1979
- 1979-02-26 JP JP2218779A patent/JPS55113963A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58148524A (en) * | 1982-02-26 | 1983-09-03 | Nippon Seiki Co Ltd | Pulse counting system |
JPS58148523A (en) * | 1982-02-26 | 1983-09-03 | Nippon Seiki Co Ltd | Pulse counting system |
JPS58170223A (en) * | 1982-03-31 | 1983-10-06 | Nippon Seiki Co Ltd | Pulse count system |
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