JPS54111650A - Overcurrent detection circuit - Google Patents
Overcurrent detection circuitInfo
- Publication number
- JPS54111650A JPS54111650A JP1828978A JP1828978A JPS54111650A JP S54111650 A JPS54111650 A JP S54111650A JP 1828978 A JP1828978 A JP 1828978A JP 1828978 A JP1828978 A JP 1828978A JP S54111650 A JPS54111650 A JP S54111650A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- transistor
- overcurrent
- conduct
- 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
- Emergency Protection Circuit Devices (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
PURPOSE: To eliminate a circuit for shutting off the supply voltage separately through the protection and retention movement of overcurrent simultaneously both in two systems of power varied in potential between each other when the overcurrent is detected in one system.
CONSTITUTION: Power is fed to a load LD from two systems of the power source, +E and -E, varied between each other with respect to OV. When overcurrent runs through a +E power source, with a drop in the voltage due to a resistance R1, a transistor Tr1 begins to conduct allowing a collector current to flow to resistances R4 and R5. Thus, a transistor Tr2 begins to conduct. With the conduction of the transistor Tr2, a collector current flows through resistances R2 and R3 thereby allowing the transistor Tr1 to conduct progressively. This prompts the transistors Tr1 and Tr2 to reach a saturated level. Thus, a state of conduction is maintained through the positive feed back applied to each other. Accordingly, the output terminal OUT1 retains a reverse state from -E potential to +E potential and the OUT2 that from +E potential to -E potential.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1828978A JPS54111650A (en) | 1978-02-20 | 1978-02-20 | Overcurrent detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1828978A JPS54111650A (en) | 1978-02-20 | 1978-02-20 | Overcurrent detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54111650A true JPS54111650A (en) | 1979-09-01 |
Family
ID=11967455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1828978A Pending JPS54111650A (en) | 1978-02-20 | 1978-02-20 | Overcurrent detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54111650A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577894U (en) * | 1980-06-14 | 1982-01-16 | ||
| JPS62187313U (en) * | 1986-05-19 | 1987-11-28 |
-
1978
- 1978-02-20 JP JP1828978A patent/JPS54111650A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577894U (en) * | 1980-06-14 | 1982-01-16 | ||
| JPH0116351Y2 (en) * | 1980-06-14 | 1989-05-15 | ||
| JPS62187313U (en) * | 1986-05-19 | 1987-11-28 |
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