JPS561620A - Output circuit - Google Patents
Output circuitInfo
- Publication number
- JPS561620A JPS561620A JP7662379A JP7662379A JPS561620A JP S561620 A JPS561620 A JP S561620A JP 7662379 A JP7662379 A JP 7662379A JP 7662379 A JP7662379 A JP 7662379A JP S561620 A JPS561620 A JP S561620A
- Authority
- JP
- Japan
- Prior art keywords
- short circuit
- diode
- base current
- output transistor
- output circuit
- 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
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To protect the output transistor from the breakdown at the short-circuit time of the load, by giving the short circuit to the base current of the control transistor via the diode and thus turning off the output transistor. CONSTITUTION:Output transistor (TR)14 has the ON/OFF action, and the base current of TR14 is controlled by control TR11. Then diode 13 is connected between the collector of TR14 and the base of TR11. Thus the short circuit is given to the base current of TR11 via diode 13 when load 15 has the short circuit. As a result, TR11 and then TR14 are turned off. In this way, the output TR can be prevented from the breakdown at the time of the short circuit fault.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7662379A JPS561620A (en) | 1979-06-18 | 1979-06-18 | Output circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7662379A JPS561620A (en) | 1979-06-18 | 1979-06-18 | Output circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS561620A true JPS561620A (en) | 1981-01-09 |
Family
ID=13610473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7662379A Pending JPS561620A (en) | 1979-06-18 | 1979-06-18 | Output circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS561620A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6273633U (en) * | 1985-10-29 | 1987-05-12 | ||
JPH0281515A (en) * | 1988-09-19 | 1990-03-22 | Furukawa Electric Co Ltd:The | Load driving circuit |
-
1979
- 1979-06-18 JP JP7662379A patent/JPS561620A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6273633U (en) * | 1985-10-29 | 1987-05-12 | ||
JPH0281515A (en) * | 1988-09-19 | 1990-03-22 | Furukawa Electric Co Ltd:The | Load driving circuit |
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