JPH0423333U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の１実施例を示す回路図、第２
図〜第４図はそれぞれ従来のスイツチング回路を
示す回路図、第５図〜第７図はそれぞれ本考案の
１実施例を示す回路図、第８図ａ〜ｆはそれぞれ
本考案に用いる電流制限手段の１例を示す回路図
、第９図〜第１０図はそれぞれ本考案の１実施例
を示す回路図、である。 符号の説明、４……電流制限手段、２１……負
荷、ｔ１〜ｔ３……端子。 Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing one embodiment of the present invention.
Figures 5 to 4 are circuit diagrams showing conventional switching circuits, Figures 5 to 7 are circuit diagrams showing one embodiment of the present invention, and Figures 8 a to f are current limiting circuits used in the present invention. FIGS. 9 and 10 are circuit diagrams each showing an embodiment of the present invention. Explanation of symbols, 4...Current limiting means, 21...Load, t1 to t3...Terminals.

Claims (1)

【実用新案登録請求の範囲】 (1) ノーマリイ・オフ形で、自己ターン・オフ
機能を持つスイツチ・デバイスがあつて、その制
御端子、主端子を制御端子ｃｔ、主端子ｍｔａ，
ｍｔｂとし、その駆動信号入力用に前記制御端子
ｃｔと前記主端子ｍｔａが対をなすとしたときに
、 それ自身に流れる電流の最大値を制限する電流
制限手段が前記主端子ｍｔａの側に来るように前
記スイツチ・デバイスと前記電流制限手段を直列
接続し、 直流電圧源の両電源端子間に前記スイツチ・デ
バイス、前記電流制限手段、及び、スイツチング
手段を直列接続し、 前記主端子ｍｔａ・制御端子ｃｔ間に前記電流
制限手段を接続し、 前記スイツチング手段がオンのとき、前記スイ
ツチ・デバイスにオン信号を出力しないオン信号
出力手段を設けたことを特徴とするスイツチング
回路。 (2) 前記スイツチング手段を前記制御端子ｃｔ
側に接続したことを特徴とする請求項１記載のス
イツチング回路。 (3) 前記スイツチング手段を前記主端子ｍｔｂ
側に接続したことを特徴とする請求項１記載のス
イツチング回路。 (4) 前記電流制限手段として定電流手段を用い
たことを特徴とする請求項１，２又は３記載のス
イツチング回路。 (5) 前記制御端子ｃｔ・主端子ｍｔａ間に印加
される逆バイアス電圧をその逆耐電圧以下に抑え
る電圧制限手段を設けたことを特徴とする請求項
１，２，３又は４記載のスイツチング回路。 (6) 前記電圧制限手段として定電圧手段を用い
たことを特徴とする請求項５記載のスイツチング
回路。 (7) 前記電圧制限手段としてサージ電圧吸収手
段を用いたことを特徴とする請求項５記載のスイ
ツチング回路。[Claims for Utility Model Registration] (1) There is a normally-off type switch device with a self-turn-off function, whose control terminals and main terminals are connected to a control terminal ct, a main terminal mta,
mtb, and when the control terminal ct and the main terminal mta form a pair for inputting a drive signal, the current limiting means for limiting the maximum value of the current flowing through itself is located on the side of the main terminal mta. The switch device and the current limiting means are connected in series so that the switch device, the current limiting means, and the switching means are connected in series between both power supply terminals of a DC voltage source, and the main terminal mta/control is connected in series. A switching circuit, characterized in that the current limiting means is connected between terminals ct, and on-signal output means is provided that does not output an on-signal to the switching device when the switching means is on. (2) The switching means is connected to the control terminal ct.
2. The switching circuit according to claim 1, wherein the switching circuit is connected to the side. (3) The switching means is connected to the main terminal mtb.
2. The switching circuit according to claim 1, wherein the switching circuit is connected to the side. (4) The switching circuit according to claim 1, 2 or 3, characterized in that constant current means is used as the current limiting means. (5) The switching device according to claim 1, 2, 3, or 4, further comprising voltage limiting means for suppressing the reverse bias voltage applied between the control terminal ct and the main terminal mta to a reverse withstand voltage or less. circuit. (6) The switching circuit according to claim 5, wherein constant voltage means is used as the voltage limiting means. (7) The switching circuit according to claim 5, wherein surge voltage absorbing means is used as the voltage limiting means.