JPS5572219A - Power circuit - Google Patents
Power circuitInfo
- Publication number
- JPS5572219A JPS5572219A JP14700578A JP14700578A JPS5572219A JP S5572219 A JPS5572219 A JP S5572219A JP 14700578 A JP14700578 A JP 14700578A JP 14700578 A JP14700578 A JP 14700578A JP S5572219 A JPS5572219 A JP S5572219A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- load
- capacitor
- circuit
- time
- 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
- Power Sources (AREA)
- Direct Current Feeding And Distribution (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To prevent a voltage of less than a fixed value from being applying across a load, by discharging a capacitor in parallel to the load when the holding voltage across the capacitor decreases blow a fixed value.
CONSTITUTION: Alternating-current power supply 1, after being rectified 2 and smoothed 3, is applied to load 11 such as a microcomputer by way of constant-voltage circuit 4 and capacitor 8. If power supply 1 is broken momently for period TS, monitor voltage VD across capacitor 8 falls down to threshold level VT. Here, voltage comparator circuit 15 operates to send a command of a momentary stop process to the load and then outputs a signal voltage to delay pulse generating circuit 16. Although this voltage is applied to circuit 16 with delay of fixed time behind at the point in time when it is inputted to circuit 16, this is selecred within the fixed time to prevent load 11 from malfunctioning and getting out of control, and holding voltage across capacitor 8 is discharged nearly at a time by way of diode 13, resistance 14 and Tr12, thereby preventing the voltage from being applied across load 11.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14700578A JPS5572219A (en) | 1978-11-27 | 1978-11-27 | Power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14700578A JPS5572219A (en) | 1978-11-27 | 1978-11-27 | Power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5572219A true JPS5572219A (en) | 1980-05-30 |
Family
ID=15420401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14700578A Pending JPS5572219A (en) | 1978-11-27 | 1978-11-27 | Power circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5572219A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573120A (en) * | 1980-06-04 | 1982-01-08 | Mitsubishi Electric Corp | Power supply circuit for microcomputer |
| JPS5875431U (en) * | 1981-11-17 | 1983-05-21 | 松下電工株式会社 | motor protection device |
| JPS6039118U (en) * | 1983-08-18 | 1985-03-18 | 株式会社リコー | power monitoring device |
| JPS624887U (en) * | 1985-06-25 | 1987-01-13 | ||
| JPS6454520A (en) * | 1987-08-25 | 1989-03-02 | Seiko Epson Corp | Power source control circuit |
| JP2007148634A (en) * | 2005-11-25 | 2007-06-14 | Koyo Electronics Ind Co Ltd | Power supply monitoring device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930843A (en) * | 1972-07-20 | 1974-03-19 | ||
| JPS5044453A (en) * | 1973-08-24 | 1975-04-21 |
-
1978
- 1978-11-27 JP JP14700578A patent/JPS5572219A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930843A (en) * | 1972-07-20 | 1974-03-19 | ||
| JPS5044453A (en) * | 1973-08-24 | 1975-04-21 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573120A (en) * | 1980-06-04 | 1982-01-08 | Mitsubishi Electric Corp | Power supply circuit for microcomputer |
| JPS5875431U (en) * | 1981-11-17 | 1983-05-21 | 松下電工株式会社 | motor protection device |
| JPS6039118U (en) * | 1983-08-18 | 1985-03-18 | 株式会社リコー | power monitoring device |
| JPS624887U (en) * | 1985-06-25 | 1987-01-13 | ||
| JPS6454520A (en) * | 1987-08-25 | 1989-03-02 | Seiko Epson Corp | Power source control circuit |
| JP2007148634A (en) * | 2005-11-25 | 2007-06-14 | Koyo Electronics Ind Co Ltd | Power supply monitoring device |
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