JPS6194916U - - Google Patents
Info
- Publication number
- JPS6194916U JPS6194916U JP18049584U JP18049584U JPS6194916U JP S6194916 U JPS6194916 U JP S6194916U JP 18049584 U JP18049584 U JP 18049584U JP 18049584 U JP18049584 U JP 18049584U JP S6194916 U JPS6194916 U JP S6194916U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- circuit
- constant voltage
- base
- resistor
- 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
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来例を示す回路図である。
１，２…入力端子、３，６，８…トランジスタ
、４，１３…定電圧素子、５，７，９，１０，１
２…抵抗、１１…コンデンサ、１５…ダイオード
。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing a conventional example. 1, 2... Input terminal, 3, 6, 8... Transistor, 4, 13... Constant voltage element, 5, 7, 9, 10, 1
2...Resistor, 11...Capacitor, 15...Diode.
Claims (1)
受け、このトランジスタのコレクタとベースを抵
抗を介して接続するとともに上記トランジスタの
ベースには定電圧素子を接続してこのトランジス
タのエミツタから出力電圧を供給するようにした
定電圧電源回路において、上記抵抗と上記トラン
ジスタのベース間に第二のＮＰＮ型トランジスタ
を接続するとともにこの第二のトランジスタのベ
ースにはこの第二のトランジスタのＯＮ・ＯＦＦ
を制御するトランジスタ回路を接続し、このトラ
ンジスタ回路には少なくとも抵抗と定電圧素子の
直列回路を接続し、上記定電圧電源回路に過電圧
が印加されると上記トランジスタ回路より上記第
二のトランジスタをＯＦＦさせるよう構成したこ
とを特徴とする過電圧保護回路を有する定電圧電
源回路。 An input voltage is received at the collector of an NPN transistor, and the collector and base of this transistor are connected through a resistor, and a constant voltage element is connected to the base of the transistor, so that an output voltage is supplied from the emitter of this transistor. In the constant voltage power supply circuit, a second NPN transistor is connected between the resistor and the base of the transistor, and the base of the second transistor is connected to the ON/OFF switch of the second transistor.
A transistor circuit is connected to the transistor circuit, and a series circuit of at least a resistor and a constant voltage element is connected to this transistor circuit, and when an overvoltage is applied to the constant voltage power supply circuit, the transistor circuit turns off the second transistor. 1. A constant voltage power supply circuit having an overvoltage protection circuit, characterized in that the overvoltage protection circuit is configured to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18049584U JPS6194916U (en) | 1984-11-28 | 1984-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18049584U JPS6194916U (en) | 1984-11-28 | 1984-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6194916U true JPS6194916U (en) | 1986-06-19 |
Family
ID=30738044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18049584U Pending JPS6194916U (en) | 1984-11-28 | 1984-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6194916U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4940733B1 (en) * | 1971-05-25 | 1974-11-05 |
-
1984
- 1984-11-28 JP JP18049584U patent/JPS6194916U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4940733B1 (en) * | 1971-05-25 | 1974-11-05 |