JPH0299413U - - Google Patents
Info
- Publication number
- JPH0299413U JPH0299413U JP757389U JP757389U JPH0299413U JP H0299413 U JPH0299413 U JP H0299413U JP 757389 U JP757389 U JP 757389U JP 757389 U JP757389 U JP 757389U JP H0299413 U JPH0299413 U JP H0299413U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- reverse current
- capacitor
- current prevention
- load
- 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
- 230000002265 prevention Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 2
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案の第１の実施例を示す回路図、
第２図は補助コンデンサが接続されていない電源
回路を示す図、第３図は本考案の第１の実施例に
おける過渡特性を示す図、第４図は本考案の第２
の実施例を示す回路図、第５図は本考案の第２の
実施例の具体例を示す回路図、第６図は従来の電
源回路を示す図である。
１……直流電源、２……負荷、３……コンデン
サ、４……逆流電流防止部、５……逆流電流防止
用トランジスタ、６……ＣＲ並列回路、７……検
知部、８……スイツチ部、８０……定電圧ダイオ
ード。
FIG. 1 is a circuit diagram showing a first embodiment of the present invention;
Fig. 2 is a diagram showing a power supply circuit to which no auxiliary capacitor is connected, Fig. 3 is a diagram showing transient characteristics in the first embodiment of the present invention, and Fig. 4 is a diagram showing the transient characteristics in the first embodiment of the present invention.
FIG. 5 is a circuit diagram showing a specific example of the second embodiment of the present invention, and FIG. 6 is a diagram showing a conventional power supply circuit. DESCRIPTION OF SYMBOLS 1...DC power supply, 2...Load, 3...Capacitor, 4...Reverse current prevention section, 5...Reverse current prevention transistor, 6...CR parallel circuit, 7...Detection section, 8...Switch Part, 80... Constant voltage diode.
Claims (1)
２の入力側とアースとの間に挿入されるコンデン
サ３と、該コンデンサ３と前記直流電源１との間
に配置され、前記コンデンサ３から前記直流電源
１への逆流電流を防止する逆流電流防止部４とを
設けてなる電源回路において、 該逆流電流防止部４が、 前記直流電源１および前記負荷２に接続するベ
ース接地形の逆流電流防止用トランジスタ５と、 該逆流電流防止用トランジスタ５のベースと前
記アースとの間に挿入されるＣＲ並列回路６とか
ら構成されることを特徴とする電源回路。 ２ 直流電源１と、該直流電源１に接続する負荷
２の入力側とアースとの間に挿入されるコンデン
サ３と、該コンデンサ３と前記直流電源１との間
に配置され、前記コンデンサ３から前記直流電源
１への逆流電流を防止する逆流電流防止部４とを
設けてなる電源回路において、 該逆流電流防止部４が、 前記直流電源１および前記負荷２に接続するベ
ース接地形の逆流電流防止用トランジスタ５と、 該逆流電流防止用トランジスタ５のベースと前
記アースとの間を導通または非導通にするスイツ
チ部７と、 前記直流電源１の出力電圧ＶＰを検知し該出力
電圧ＶＰが所定の値より低下したときに前記スイ
ツチ部７を非導通にする検知部８とから構成され
ることを特徴とする電源回路。[Claims for Utility Model Registration] 1. A DC power supply 1, a capacitor 3 inserted between the input side of a load 2 connected to the DC power supply 1, and the ground, and between the capacitor 3 and the DC power supply 1. A power supply circuit including a reverse current prevention section 4 disposed in the capacitor 3 and preventing reverse current from flowing from the capacitor 3 to the DC power supply 1, wherein the reverse current prevention section 4 is arranged in the DC power supply 1 and the load 2. A power supply circuit comprising: a reverse current prevention transistor 5 having a grounded base; and a CR parallel circuit 6 inserted between the base of the reverse current prevention transistor 5 and the ground. 2. A capacitor 3 inserted between the DC power supply 1, the input side of the load 2 connected to the DC power supply 1, and the ground, and a capacitor 3 disposed between the capacitor 3 and the DC power supply 1, A power supply circuit including a reverse current prevention unit 4 that prevents reverse current from flowing to the DC power supply 1, wherein the reverse current prevention unit 4 prevents reverse current from flowing through the base grounding surface connected to the DC power supply 1 and the load 2. A prevention transistor 5, a switch section 7 that makes conductive or non-conductive between the base of the reverse current prevention transistor 5 and the ground, and detects the output voltage VP of the DC power supply 1 and determines that the output voltage VP is a predetermined value. and a detection section 8 which makes the switch section 7 non-conductive when the value falls below a value of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP757389U JPH0299413U (en) | 1989-01-27 | 1989-01-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP757389U JPH0299413U (en) | 1989-01-27 | 1989-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0299413U true JPH0299413U (en) | 1990-08-08 |
Family
ID=31212693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP757389U Pending JPH0299413U (en) | 1989-01-27 | 1989-01-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0299413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07191766A (en) * | 1993-11-15 | 1995-07-28 | Internatl Business Mach Corp <Ibm> | Electric power control circuit for connection of circuit card |
-
1989
- 1989-01-27 JP JP757389U patent/JPH0299413U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07191766A (en) * | 1993-11-15 | 1995-07-28 | Internatl Business Mach Corp <Ibm> | Electric power control circuit for connection of circuit card |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0299413U (en) | ||
| JP2554285Y2 (en) | Instantaneous current supply circuit | |
| JPH0255180U (en) | ||
| JPH0380692U (en) | ||
| JPH0298525U (en) | ||
| JPH0263106U (en) | ||
| JPH039019U (en) | ||
| JPH01107171U (en) | ||
| JPH01175311U (en) | ||
| JPS6324611U (en) | ||
| JPS58101218U (en) | DC stabilized power supply circuit | |
| JPS6368025U (en) | ||
| JPS63137534U (en) | ||
| JPS61129485U (en) | ||
| JPH01180889U (en) | ||
| JPS6366023U (en) | ||
| JPH01166437U (en) | ||
| JPS61110175U (en) | ||
| JPS6433268U (en) | ||
| JPS63137540U (en) | ||
| JPS621431U (en) | ||
| JPS6339716U (en) | ||
| JPH0480235U (en) | ||
| JPS60123016U (en) | power circuit | |
| JPH0250737U (en) |