JPS5566135A - Power unit of electronic counter - Google Patents
Power unit of electronic counterInfo
- Publication number
- JPS5566135A JPS5566135A JP13949878A JP13949878A JPS5566135A JP S5566135 A JPS5566135 A JP S5566135A JP 13949878 A JP13949878 A JP 13949878A JP 13949878 A JP13949878 A JP 13949878A JP S5566135 A JPS5566135 A JP S5566135A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- counter
- output voltage
- service interruption
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/40—Monitoring; Error detection; Preventing or correcting improper counter operation
- H03K21/403—Arrangements for storing the counting state in case of power supply interruption
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
PURPOSE:To prevent the malfunction of the counter occurring at the service interruption time by providing the voltage detection circuit and the service interruption time backup battery to the power unit and thus supplying the voltage of the backup battery to the counter when the output voltage of the power unit becomes lower than the fixed voltage due to the interruption of the power supply. CONSTITUTION:Rectifier circuit 23 is connected to AC power source AC, and constant voltage circuit 25 turns the output voltage of circuit 23 into the constant voltage. In addition, voltage detection circuit 27 is provided to generate the detection signal when the output voltage of circuit 25 becomes lower than the fixed level. The output voltage of circuit 25 is supplied to the counter via circuit 27 as well as to electronic unit 26 which supplies the counter input signal. Circuit 27 detects that the output voltage of circuit 25 becomes lower than the fixed level due to variation of source AC by the service interruption or the like, and then the service interruption detection signal is supplied to the counter via buffer circuit 28 to stop the supply function of the input signal. At the same time, the voltage of service interruption time backup battery is supplied to circuit 27 and unit 26.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13949878A JPS5566135A (en) | 1978-11-13 | 1978-11-13 | Power unit of electronic counter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13949878A JPS5566135A (en) | 1978-11-13 | 1978-11-13 | Power unit of electronic counter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566135A true JPS5566135A (en) | 1980-05-19 |
Family
ID=15246665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13949878A Pending JPS5566135A (en) | 1978-11-13 | 1978-11-13 | Power unit of electronic counter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566135A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63105526A (en) * | 1986-10-22 | 1988-05-10 | Fuji Electric Co Ltd | Electronic counter |
-
1978
- 1978-11-13 JP JP13949878A patent/JPS5566135A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63105526A (en) * | 1986-10-22 | 1988-05-10 | Fuji Electric Co Ltd | Electronic counter |
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