JPS5630673A - Pulse counting timer - Google Patents
Pulse counting timerInfo
- Publication number
- JPS5630673A JPS5630673A JP10752779A JP10752779A JPS5630673A JP S5630673 A JPS5630673 A JP S5630673A JP 10752779 A JP10752779 A JP 10752779A JP 10752779 A JP10752779 A JP 10752779A JP S5630673 A JPS5630673 A JP S5630673A
- Authority
- JP
- Japan
- Prior art keywords
- counter
- square wave
- output
- pulse counting
- generator
- 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 Predetermined Time Intervals (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE: To achieve less influence from noise with a constant frequency of the reference pulse to be counted by counting it with a counter to be controlled by a low frequency square wave variable in duty.
CONSTITUTION: The output of a reference pulse generator 3 for generating a constant frequency pulse is inputted into a counter 10 as an "and" 5 with the output of a square wave generator 4 for producing a low frequency square wave. The time limit of a timer is changed depending on the duty ratio of the square wave generator 4. A counter with an inhibit input terminal may replace a "and" circuit 5 and the counter 10.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10752779A JPS5630673A (en) | 1979-08-22 | 1979-08-22 | Pulse counting timer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10752779A JPS5630673A (en) | 1979-08-22 | 1979-08-22 | Pulse counting timer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5630673A true JPS5630673A (en) | 1981-03-27 |
Family
ID=14461443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10752779A Pending JPS5630673A (en) | 1979-08-22 | 1979-08-22 | Pulse counting timer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5630673A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7026729B2 (en) * | 2002-01-08 | 2006-04-11 | Timothy C. Homan | Exhaust fan timeout system |
-
1979
- 1979-08-22 JP JP10752779A patent/JPS5630673A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7026729B2 (en) * | 2002-01-08 | 2006-04-11 | Timothy C. Homan | Exhaust fan timeout system |
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