JPH0888485A - Hot-line insertion circuit - Google Patents
Hot-line insertion circuitInfo
- Publication number
- JPH0888485A JPH0888485A JP22293694A JP22293694A JPH0888485A JP H0888485 A JPH0888485 A JP H0888485A JP 22293694 A JP22293694 A JP 22293694A JP 22293694 A JP22293694 A JP 22293694A JP H0888485 A JPH0888485 A JP H0888485A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- wiring board
- printed wiring
- circuit
- power supply
- 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
Landscapes
- Mounting Of Printed Circuit Boards And The Like (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は外部電源により給電が行
われる印刷配線板とその活線挿入回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board which is supplied with power from an external power source and a hot-plug circuit for the printed wiring board.
【0002】[0002]
【従来の技術】従来回路は特開昭62−76800の公
知例に示されている。2. Description of the Related Art A conventional circuit is shown in a known example of JP-A-62-76800.
【0003】図2を用いて、この回路の動作を説明す
る。The operation of this circuit will be described with reference to FIG.
【0004】本回路は印刷配線板3をコネクタ2の正側
出力端子2a、負側出力端子2bに挿入すると、印刷配
線板3側のコネクタ2の正側入力端子2cが前記端子2
aに、コネクタ2の負側入力端子2dが前記端子2bに
各々接続して電気的に接続状態となる。In this circuit, when the printed wiring board 3 is inserted into the positive side output terminal 2a and the negative side output terminal 2b of the connector 2, the positive side input terminal 2c of the connector 2 on the side of the printed wiring board 3 becomes the terminal 2.
The negative input terminals 2d of the connector 2 are connected to the terminals a and are electrically connected to the terminals 2b.
【0005】印刷配線板挿入直後には、直流電源1の出
力電流が正側出力母線1a→端子2a→端子2c→抵抗
R→コンデンサC→端子2d→端子2b→負側出力母線
1bなるループを通して流れるので、トランジスタQの
ベース電流はコンデンサCに吸収され、トランジスタQ
はカットオフされたままの状態となる。Immediately after the printed wiring board is inserted, the output current of the DC power supply 1 passes through a loop of the positive side output busbar 1a → terminal 2a → terminal 2c → resistor R → capacitor C → terminal 2d → terminal 2b → negative side output busbar 1b. Since it flows, the base current of the transistor Q is absorbed by the capacitor C, and the transistor Q
Remains cut off.
【0006】このため直流電源1から論理回路4へは給
電されない。Therefore, power is not supplied from the DC power supply 1 to the logic circuit 4.
【0007】次にコンデンサCは直流電源1から供給さ
れる電流によって、抵抗RとコンデンサCの値で決まる
時定数に沿って充電される。Next, the capacitor C is charged by the current supplied from the DC power source 1 along a time constant determined by the values of the resistor R and the capacitor C.
【0008】するとコンデンサCの両端電圧は徐々に上
昇するので、それにつれてトランジスタQのコレクタ電
流が流れ始め、該コレクタ電流は徐々に増加する。Then, the voltage across the capacitor C gradually rises, and accordingly, the collector current of the transistor Q begins to flow, and the collector current gradually increases.
【0009】これによって直流電源1の出力電流は、正
側出力母線1a→端子2a→端子2c→トランジスタQ
のコレクタ、エミッタ→論理回路4→端子2d→端子2
b→負側出力母線1bなるループを通して流れ、論理回
路4に給電が開始される。As a result, the output current of the DC power supply 1 is positive side output bus bar 1a → terminal 2a → terminal 2c → transistor Q.
Collector, emitter → logic circuit 4 → terminal 2d → terminal 2
Flowing through the loop of b → negative side output bus 1b, power supply to the logic circuit 4 is started.
【0010】さらにコンデンサCの充電が完了するとト
ランジスタQは定常オン状態になり、論理回路4には定
格電力が給電される。Further, when the charging of the capacitor C is completed, the transistor Q is in a steady ON state, and the logic circuit 4 is supplied with rated power.
【0011】以降は通常動作状態となり、トランジスタ
Qがオン状態を維持するので、論理回路4に電力が供給
され続ける。上記のように印刷配線板3の活線挿入時
は、抵抗RとコンデンサCで決まる時定数に沿ってじょ
じょに論理回路4へ給電が行なわれるので、直流電源1
の出力電圧が急激に低下すること、さらに電流の急激な
変化が無いので電磁誘導によるノイズの発性は避けられ
る。このため直流電源1の出力母線1a、1bに接続さ
れている他の印刷配線板(図示省略)にも安定した電力
を供給し続けることができる。After that, the normal operation state is entered and the transistor Q is maintained in the ON state, so that power is continuously supplied to the logic circuit 4. As described above, when the printed wiring board 3 is hot-plugged, power is gradually supplied to the logic circuit 4 along the time constant determined by the resistor R and the capacitor C.
Since the output voltage of 1 is drastically decreased and the current is not drastically changed, the generation of noise due to electromagnetic induction can be avoided. Therefore, it is possible to continuously supply stable power to other printed wiring boards (not shown) connected to the output buses 1a and 1b of the DC power supply 1.
【0012】[0012]
【発明が解決しようとする課題】上記従来の印刷配線板
の活線挿入回路は、トランジスタを使用した回路ちなっ
ているため、回路が複雑になり小形化を阻害すると共に
信頼性にも問題があった。Since the above-mentioned conventional hot-line insertion circuit for a printed wiring board is composed of a circuit using a transistor, the circuit becomes complicated and hinders miniaturization, and there is a problem in reliability. there were.
【0013】[0013]
【課題を解決するための手段】上記目的を達成するた
め、本発明では電源入力端子と印刷回路を結ぶ電路に電
流立上りの一瞬のみ高インピーダンスを示す特性を持っ
た可飽和インダクタンスを介挿することにより、印刷配
線板を外部電源に活線挿入したときは、前記可飽和イン
ダクタンスのインピーダンスにより印刷回路への給電量
を制限するとともに、時間が経過するとともにインピー
ダンスが小さくなり印刷回路への給電量を最大にするよ
うにして、印刷配線板の活線挿入時に直流の出力電圧が
急激に低下すること、さらに電流の急激な変化が無いの
で電磁誘導によるノイズの発性を避けようとするもので
ある。In order to achieve the above object, in the present invention, a saturable inductance having a characteristic of exhibiting a high impedance only for a moment when a current rises is inserted in a circuit connecting a power input terminal and a printed circuit. Therefore, when the printed wiring board is hot-plugged into the external power source, the amount of power supply to the printed circuit is limited by the impedance of the saturable inductance, and the impedance becomes smaller with the passage of time to reduce the amount of power supply to the printed circuit. It is intended to avoid the generation of noise due to electromagnetic induction because the output voltage of direct current sharply drops when the printed wiring board is hot-plugged and there is no rapid change in current. .
【0014】[0014]
【作用】図1において、印刷配線板3をコネクタ2に活
線挿入すると可飽和インダクタンス5を介して論理回路
4に給電されるので電流立上りの一瞬のみ高インピーダ
ンスにより給電量が制限される。In FIG. 1, when the printed wiring board 3 is hot-inserted into the connector 2, power is supplied to the logic circuit 4 through the saturable inductance 5, so that the amount of power supply is limited by the high impedance only for a moment when the current rises.
【0015】それによって、印刷配線板3の活線挿入時
に直流電源1の出力電圧が急激に低下すること、さらに
電流の急激な変化が無いので電磁誘導によるノイズの発
性を避けれる。As a result, when the printed wiring board 3 is hot-plugged, the output voltage of the DC power supply 1 is drastically reduced, and since there is no abrupt change in the current, the generation of noise due to electromagnetic induction can be avoided.
【0016】活線挿入後は、可飽和インダクタンスのイ
ンピーダンスが時間が経過するとともに小さくなり印刷
配線板3への給電量を増加させる。After the hot wire is inserted, the impedance of the saturable inductance becomes smaller with the lapse of time, and the power supply amount to the printed wiring board 3 is increased.
【0017】[0017]
【実施例】以下、本発明の一実施例を図1により説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
【0018】図1において、印刷配線板3をコネクタ2
の正側端子2a、負側端子2bに挿入すると、印刷配線
板3側のコネクタ2の正側入力端子2cが前記端子2a
に、コネクタ2の負側入力端子2dが前記端子2bに各
々接続して電気的に接続状態となる。In FIG. 1, the printed wiring board 3 is connected to the connector 2
When the positive side input terminal 2c of the connector 2 on the printed wiring board 3 side is inserted into the positive side terminal 2a and the negative side terminal 2b of the terminal 2a.
Then, the negative side input terminals 2d of the connector 2 are connected to the terminals 2b, respectively, and are electrically connected.
【0019】印刷配線板3を挿入すると、直流電源1の
出力電流が正側出力母線1a→端子2a→端子2c→可
飽和インダクタンス5→論理回路4→端子2b→負側出
力母線1bなるループを通して流れるので、可飽和イン
ダクタンス5の電流立上時の高インピーダンスにより給
電量が制限される。When the printed wiring board 3 is inserted, the output current of the DC power supply 1 passes through a loop of positive side output busbar 1a → terminal 2a → terminal 2c → saturable inductance 5 → logic circuit 4 → terminal 2b → negative side output busbar 1b. Since the current flows, the amount of power supply is limited by the high impedance of the saturable inductance 5 when the current rises.
【0020】それによって、印刷配線板3を活線挿入し
ても直流電源1の出力電圧が急激に低下すること、さら
に電流の急激な変化が無いので電磁誘導によるノイズの
発性も無い。As a result, even if the printed wiring board 3 is hot-inserted, the output voltage of the DC power supply 1 is drastically reduced, and since the current is not abruptly changed, noise due to electromagnetic induction is not generated.
【0021】活線挿入後は、可飽和インダクタンス5の
インピーダンスが時間が経過するとともに小さくなり印
刷配線板3への給電量を増加させ最大にする。After the hot wire is inserted, the impedance of the saturable inductance 5 becomes smaller with the lapse of time, and the amount of electric power supplied to the printed wiring board 3 is increased and maximized.
【0022】このため、直流電源1の出力母線1a、1
bに接続されている他の印刷配線板(図示省略)にも安
定した電力を供給し続けることができる。For this reason, the output buses 1a, 1 of the DC power supply 1 are
Stable electric power can be continuously supplied also to another printed wiring board (not shown) connected to b.
【0023】[0023]
【発明の効果】本発明によれば、トランジスタを使用す
ることなく印刷配線板の活線挿入回路を構成できるの
で、回路の簡素化が出来小形化と高信頼化がはかれる効
果がある。According to the present invention, a hot-line insertion circuit of a printed wiring board can be constructed without using a transistor, so that the circuit can be simplified and downsized and the reliability can be improved.
【図1】本発明の実施例。FIG. 1 is an example of the present invention.
【図2】従来の回路例。FIG. 2 shows a conventional circuit example.
【図3】可飽和インダクタンスの電流とインダクタンス
の特性。FIG. 3 shows the current and inductance characteristics of saturable inductance.
【図4】可飽和インダクタンスの時間とインピーダンス
の特性例である。FIG. 4 is a characteristic example of time and impedance of saturable inductance.
1…直流電源、 2…印刷配線板用コネクタ、 3…印刷配線板、 4…論理回路、 5…可飽和インダクタンス、 6…制御回路、 R…抵抗、 C…コンデンサ、 Q…トランジスタ。 DESCRIPTION OF SYMBOLS 1 ... DC power supply, 2 ... Connector for printed wiring board, 3 ... Printed wiring board, 4 ... Logic circuit, 5 ... Saturable inductance, 6 ... Control circuit, R ... Resistor, C ... Capacitor, Q ... Transistor.
Claims (2)
路を設けて成る印刷配線板において、電源入力端子と印
刷配線板を結ぶ電路に可飽和インダクタンスを介挿した
ことを特徴とする活線挿入回路。1. A printed wiring board provided with a printed circuit which is operated by power supply from an external power source, wherein a saturable inductance is inserted in a circuit connecting the power input terminal and the printed wiring board. circuit.
設けて成る印刷配線板を外部電源に活線挿入する印刷配
線板の活線挿入回路において、前記印刷配線板を外部電
源に活線挿入したときは、前記可飽和インダクタンスの
特性により、初期の電流立上りを制限するとともに、時
間が経過するとともにインピーダンスが小さくなり印刷
回路への給電量を最大にすることを特徴とする印刷配線
板の活線挿入回路。2. A hot-line insertion circuit of a printed wiring board for hot-inserting a printed wiring board, which is provided with a printed circuit that operates by external power supply, into an external power supply, wherein the printed wiring board is hot-inserted into an external power supply. In this case, due to the characteristic of the saturable inductance, the initial current rise is limited, and the impedance becomes smaller with the lapse of time to maximize the amount of power supply to the printed circuit. Line insertion circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22293694A JPH0888485A (en) | 1994-09-19 | 1994-09-19 | Hot-line insertion circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22293694A JPH0888485A (en) | 1994-09-19 | 1994-09-19 | Hot-line insertion circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0888485A true JPH0888485A (en) | 1996-04-02 |
Family
ID=16790196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22293694A Pending JPH0888485A (en) | 1994-09-19 | 1994-09-19 | Hot-line insertion circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0888485A (en) |
-
1994
- 1994-09-19 JP JP22293694A patent/JPH0888485A/en active Pending
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