JPS6220379U - - Google Patents
Info
- Publication number
- JPS6220379U JPS6220379U JP11256385U JP11256385U JPS6220379U JP S6220379 U JPS6220379 U JP S6220379U JP 11256385 U JP11256385 U JP 11256385U JP 11256385 U JP11256385 U JP 11256385U JP S6220379 U JPS6220379 U JP S6220379U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- detection circuit
- current detection
- resistor
- thermistor
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
Description
第１図は本考案の一実施例たる電流検出回路の
回路図、第２図乃至第６図は本実施例における周
囲温度と電流の閾値との関係を示す特性図、第７
図及び第８図はそれぞれ従来の電流検出回路の回
路図、第９図は第７図に示す回路における周囲温
度と電流の閾値との関係を示す特性図、第１０図
乃至第１４図は第８図に示す回路における周囲温
度と電流の閾値との関係を示す特性図である。
１……給電路、Ｑ……トランジスタ、Ｒａ……
第１の抵抗、Ｒｂ……サーミスタ、Ｒｃ……第２
の抵抗。
FIG. 1 is a circuit diagram of a current detection circuit that is an embodiment of the present invention, FIGS. 2 to 6 are characteristic diagrams showing the relationship between ambient temperature and current threshold in this embodiment, and FIG.
8 and 8 are respectively circuit diagrams of conventional current detection circuits, FIG. 9 is a characteristic diagram showing the relationship between ambient temperature and current threshold in the circuit shown in FIG. 7, and FIGS. FIG. 9 is a characteristic diagram showing the relationship between ambient temperature and current threshold in the circuit shown in FIG. 8; 1...Power supply line, Q...Transistor, Ra...
First resistor, Rb...thermistor, Rc...second
resistance.
Claims (1)
の抵抗の両端間に生ずる電圧に応じて動作するト
ランジスタと、このトランジスタの温度補償を行
うサーミスタとを有し、前記給電路に流れる電流
を検出する電流検出回路において、前記サーミス
タに直列に第２の抵抗を接続したことを特徴とす
る電流検出回路。 a first resistor connected in the power supply path;
In a current detection circuit that detects a current flowing in the power supply path, the current detection circuit includes a transistor that operates according to a voltage generated across a resistor, and a thermistor that performs temperature compensation of this transistor, and a second transistor that is connected in series with the thermistor. A current detection circuit characterized by connecting a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11256385U JPS6220379U (en) | 1985-07-22 | 1985-07-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11256385U JPS6220379U (en) | 1985-07-22 | 1985-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6220379U true JPS6220379U (en) | 1987-02-06 |
Family
ID=30993556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11256385U Pending JPS6220379U (en) | 1985-07-22 | 1985-07-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6220379U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872065A (en) * | 1981-10-26 | 1983-04-28 | Canon Inc | Temperature compensating circuit for ammeter |
-
1985
- 1985-07-22 JP JP11256385U patent/JPS6220379U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872065A (en) * | 1981-10-26 | 1983-04-28 | Canon Inc | Temperature compensating circuit for ammeter |
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