JPS61192309U - - Google Patents

Description

Translated fromJapanese

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

第１図は本考案による定電圧回路装置の一実施
例を示す回路図、第２図はその各部の波形を示す
波形図、第３図は本考案による定電圧回路装置の
他の実施例を示す回路図、第４図は従来の定電圧
回路の一例を示す回路図、第５図はその各部の波
形を示す波形図である。 １……交流電源、２……スイツチ、３……ダイ
オードブリツジ、５，８，１２〜１４，２１，３
０，３１，３３……トランジスタ、６，９，１８
，２３……コンデンサ、４，７，１６，２０，３
７……ツエナダイオード。 Fig. 1 is a circuit diagram showing one embodiment of the constant voltage circuit device according to the present invention, Fig. 2 is a waveform diagram showing waveforms of each part thereof, and Fig. 3 is a circuit diagram showing another embodiment of the constant voltage circuit device according to the present invention. 4 is a circuit diagram showing an example of a conventional constant voltage circuit, and FIG. 5 is a waveform diagram showing waveforms of each part thereof. 1... AC power supply, 2... Switch, 3... Diode bridge, 5, 8, 12 to 14, 21, 3
0, 31, 33...transistor, 6, 9, 18
, 23... Capacitor, 4, 7, 16, 20, 3
7...Zena diode.

Claims (1)

Translated fromJapanese

【実用新案登録請求の範囲】(1) 整流回路と、整流出力を所定電圧以下に降
圧する降圧回路と、前記降圧回路の出力を所定電
圧に安定化する定電圧回路と、を有する定電圧回
路装置であつて、 前記整流回路の出力端に設けられた電圧検出回
路と、 前記電圧検出回路の検出電圧が一定電圧以上の
ときに動作し前記降圧回路を停止させる第１のス
イツチング手段と、 前記定電圧回路の動作時に前記第１のスイツチ
ング手段の動作を停止する第２のスイツチング手
段と、を具備することを特徴とする定電圧回路装
置。(2) 前記降圧回路は、ツエナダイオードとトラ
ンジスタを有し整流出力を所定電圧以下に降圧す
る定電圧回路であることを特徴とする実用新案登
録請求の範囲第１項記載の定電圧回路装置。(3) 前記降圧回路は、スイツチングレギユレー
タであることを特徴とする実用新案登録請求の範
囲第１項記載の定電圧回路装置。[Claims for Utility Model Registration] (1) A constant voltage circuit having a rectifier circuit, a step-down circuit that steps down the rectified output to a predetermined voltage or less, and a constant voltage circuit that stabilizes the output of the step-down circuit to a predetermined voltage. The apparatus comprises: a voltage detection circuit provided at the output end of the rectifier circuit; a first switching means that operates when the voltage detected by the voltage detection circuit is equal to or higher than a certain voltage to stop the step-down circuit; A constant voltage circuit device comprising: second switching means for stopping the operation of the first switching means when the constant voltage circuit is in operation. (2) The constant voltage circuit device according to claim 1, wherein the step-down circuit is a constant voltage circuit that includes a Zener diode and a transistor and steps down the rectified output to a predetermined voltage or less. (3) The constant voltage circuit device according to claim 1, wherein the step-down circuit is a switching regulator.