JPS5843192U - switching power supply circuit - Google Patents
switching power supply circuitInfo
- Publication number
- JPS5843192U JPS5843192U JP13792981U JP13792981U JPS5843192U JP S5843192 U JPS5843192 U JP S5843192U JP 13792981 U JP13792981 U JP 13792981U JP 13792981 U JP13792981 U JP 13792981U JP S5843192 U JPS5843192 U JP S5843192U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- switching power
- transistor
- supply circuit
- level shift
- 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.)
- Granted
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は自励式スイッチング電源回路の従来例を示す回
路図、第２図は本考案による自励式スイッチング電源回
路の一実施例を示す回路図、第３図は第２図の動作を説
明するための波形図、第４図は第２図におけるレベルシ
フト回路の他の実施例を示す回路図である。
主要部分の符号の説明、２０．２１・・・・・・レベル
シフト回路、Ｑ□、Ｑ２・・・・・・スイッチングトラ
ンジスタ、Ｔ□、Ｔ２・・・・・・トランス。Fig. 1 is a circuit diagram showing a conventional example of a self-excited switching power supply circuit, Fig. 2 is a circuit diagram showing an embodiment of a self-excited switching power supply circuit according to the present invention, and Fig. 3 explains the operation of Fig. 2. FIG. 4 is a circuit diagram showing another embodiment of the level shift circuit in FIG. 2. Explanation of symbols of main parts, 20.21...Level shift circuit, Q□, Q2...Switching transistor, T□, T2...Transformer.
Claims (3)
タを交互にオン・オフせしめてトランスの１次側に流れ
る電流の方向を変化させ、このトランスの２次側に発生
する電圧を整流することによって所定直流電圧を出力す
るスイッチング電源回路であって、前記トランジスタの
ベース側にレベルシフト回路を有し、このレベルシフト
回路によって前記トランジスタのオン・オフａ作の周期
を制御可能としたことを特徴とするスイッチング電源回
路。(1) Equipped with a plurality of transistors, the transistors are alternately turned on and off to change the direction of the current flowing to the primary side of the transformer, and the voltage generated on the secondary side of the transformer is rectified. A switching power supply circuit that outputs a DC voltage, characterized in that it has a level shift circuit on the base side of the transistor, and the level shift circuit makes it possible to control the on/off cycle of the transistor. Switching power supply circuit.
ースに直列接続された少な（とも１個のダイオードから
なることを特徴とする実用新案登録請求の範囲第１項記
載のスイッチング電源回路。(2) The switching power supply circuit according to claim 1, wherein the level shift circuit comprises at least one diode connected in series to the base of the transistor.
タのベースに直列接続されたトランジスタと、このトラ
ンジスタのベースとコレクタ及びエミッタとの間に夫々
接続された抵抗とからなることを特徴とする実用新案登
録請求の範囲第１項記載のスイッチング電源回路゛。(3) Registration of a utility model characterized in that the level shift circuit 1 comprises a transistor connected in series to the base of the transistor, and resistors connected between the base, collector, and emitter of the transistor, respectively. A switching power supply circuit according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13792981U JPS5843192U (en) | 1981-09-17 | 1981-09-17 | switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13792981U JPS5843192U (en) | 1981-09-17 | 1981-09-17 | switching power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5843192U true JPS5843192U (en) | 1983-03-23 |
| JPS6316311Y2 JPS6316311Y2 (en) | 1988-05-10 |
Family
ID=29931176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13792981U Granted JPS5843192U (en) | 1981-09-17 | 1981-09-17 | switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843192U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49113122A (en) * | 1973-03-02 | 1974-10-29 |
-
1981
- 1981-09-17 JP JP13792981U patent/JPS5843192U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49113122A (en) * | 1973-03-02 | 1974-10-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6316311Y2 (en) | 1988-05-10 |
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