JPS5655887A - Time-compensating method for timer in power failure - Google Patents
Time-compensating method for timer in power failureInfo
- Publication number
- JPS5655887A JPS5655887A JP13130579A JP13130579A JPS5655887A JP S5655887 A JPS5655887 A JP S5655887A JP 13130579 A JP13130579 A JP 13130579A JP 13130579 A JP13130579 A JP 13130579A JP S5655887 A JPS5655887 A JP S5655887A
- Authority
- JP
- Japan
- Prior art keywords
- time
- power failure
- counting
- counter
- power
- 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
- Electric Clocks (AREA)
Abstract
PURPOSE: To perform time compensation at the time of power failure simply and surely by using a capacitor as a backup power source by making the device perform the temporary storage of the content of counting in a memory, the counting of a counter for power failure and other actions required at least.
CONSTITUTION: When the main power source part 1 using a commercial power source 11 falls in the power failure, the transistor 51 of a power down sense 5 is turned off, while the transistor 52 is turned on reversely, and the gate 21 of a counting circuit 2 is opend, and thus the content of counting of a time-counting counter 21 is written in the RAM4. Meanwhile, an oscillator 7 for counting at power failure starts oscillation through the intermediary of the transistor 52, a counter 81 operating for the time of the power failure counts the time. After restoration from the failure, the content of counting of the counter 21 is corrected based on the content of the RAM4 and the counter 81. By the constitution wherein the feeding of power to the circuit, etc. required at least at the time of power failure, the time compensation for the timer at the power failure can be performed simply and surely by using the capacitor 63 as the backup power source.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13130579A JPS5655887A (en) | 1979-10-13 | 1979-10-13 | Time-compensating method for timer in power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13130579A JPS5655887A (en) | 1979-10-13 | 1979-10-13 | Time-compensating method for timer in power failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5655887A true JPS5655887A (en) | 1981-05-16 |
Family
ID=15054844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13130579A Pending JPS5655887A (en) | 1979-10-13 | 1979-10-13 | Time-compensating method for timer in power failure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5655887A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845589A (en) * | 1981-09-11 | 1983-03-16 | Chino Works Ltd | Clock function compensating circuit for power failure |
| JPS5845685U (en) * | 1981-09-24 | 1983-03-28 | 加藤 正吉 | Automatic shaping device in manjiyu making machine |
| JPS5955676A (en) * | 1982-09-25 | 1984-03-30 | Ricoh Co Ltd | Accumulating and reproducing device of facsimile |
| JPS63298091A (en) * | 1987-05-29 | 1988-12-05 | Toyo Commun Equip Co Ltd | Time code generator |
-
1979
- 1979-10-13 JP JP13130579A patent/JPS5655887A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5845589A (en) * | 1981-09-11 | 1983-03-16 | Chino Works Ltd | Clock function compensating circuit for power failure |
| JPS5845685U (en) * | 1981-09-24 | 1983-03-28 | 加藤 正吉 | Automatic shaping device in manjiyu making machine |
| JPS5955676A (en) * | 1982-09-25 | 1984-03-30 | Ricoh Co Ltd | Accumulating and reproducing device of facsimile |
| JPH0131343B2 (en) * | 1982-09-25 | 1989-06-26 | Ricoh Kk | |
| JPS63298091A (en) * | 1987-05-29 | 1988-12-05 | Toyo Commun Equip Co Ltd | Time code generator |
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