JPS6455013A - Power circuit - Google Patents
Power circuitInfo
- Publication number
- JPS6455013A JPS6455013A JP62210183A JP21018387A JPS6455013A JP S6455013 A JPS6455013 A JP S6455013A JP 62210183 A JP62210183 A JP 62210183A JP 21018387 A JP21018387 A JP 21018387A JP S6455013 A JPS6455013 A JP S6455013A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- cpu
- voltage
- signal
- signal line
- 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.)
- Granted
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To reduce the size and cost of a power source circuit by monitoring a voltage by means of a CPU. CONSTITUTION:A power source switch 13 is depressed to feed a signal of level 'L' through a signal line 4 to a CPU 11. The CPU 11 reads a voltage value digitized by an A/D converter 12 through a signal line P3 to confirm whether the voltage of a power source 14 falls within a predetermined value of 4-4.5V or not. When the voltage of the power source becomes a lower limit value or less or an upper limit value or more, the CPU 11 feeds a reset signal through a signal line P1 and a gate array 22 to the CPU 21, returns the system to an initial state, then feeds an OFF signal through a signal line P2 to a transistor 15, and turns OFF the power supply to the system of the power source 14. Further, when an operator depressed a power switch 13 in the state that the power source 14 is ON, the depression is detected, and the CPU 11 similarly generates the reset signal to turn OFF the power source 14.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62210183A JP2659194B2 (en) | 1987-08-26 | 1987-08-26 | Power supply circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62210183A JP2659194B2 (en) | 1987-08-26 | 1987-08-26 | Power supply circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6455013A true JPS6455013A (en) | 1989-03-02 |
JP2659194B2 JP2659194B2 (en) | 1997-09-30 |
Family
ID=16585158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62210183A Expired - Fee Related JP2659194B2 (en) | 1987-08-26 | 1987-08-26 | Power supply circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2659194B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5201824A (en) * | 1989-10-06 | 1993-04-13 | Alps Electric Co., Ltd. | Push button switch |
US5203448A (en) * | 1991-02-12 | 1993-04-20 | Minebea Co., Ltd. | Push button key switch |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56162924A (en) * | 1980-05-16 | 1981-12-15 | Hitachi Electronics | Voltage monitoring device for power source |
JPS61258627A (en) * | 1985-05-07 | 1986-11-17 | 富士通株式会社 | Power source control circuit |
-
1987
- 1987-08-26 JP JP62210183A patent/JP2659194B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56162924A (en) * | 1980-05-16 | 1981-12-15 | Hitachi Electronics | Voltage monitoring device for power source |
JPS61258627A (en) * | 1985-05-07 | 1986-11-17 | 富士通株式会社 | Power source control circuit |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5201824A (en) * | 1989-10-06 | 1993-04-13 | Alps Electric Co., Ltd. | Push button switch |
US5203448A (en) * | 1991-02-12 | 1993-04-20 | Minebea Co., Ltd. | Push button key switch |
Also Published As
Publication number | Publication date |
---|---|
JP2659194B2 (en) | 1997-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |