JPS60184136U

JPS60184136U - reset circuit

Info

Publication number: JPS60184136U
Application number: JP7285584U
Authority: JP
Inventors: 仁宏藤山
Original assignee: 三洋電機株式会社
Priority date: 1984-05-17
Filing date: 1984-05-17
Publication date: 1985-12-06

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

[Brief explanation of the drawing]

第１図は本考案のリセット回路を示す回路図、第２図は
バックアップ電源を用いた従来のリセット回路の一例を
示す回路−である。主な図番の説明、ス・・・電源回路、５・・・バックア
ップ電源、１１・・・制御部、ｌｌｂ・・・リセット端
子、１２・・・定電圧ダイオード、１３・・・第１のト
ランジスタ、１４・・・第２のトランジスタ、１６．１
７．１Ｂ、１９，２０，２１・・・抵抗、２２・・・ス
イッチ手段。FIG. 1 is a circuit diagram showing a reset circuit of the present invention, and FIG. 2 is a circuit diagram showing an example of a conventional reset circuit using a backup power source. Explanation of main figure numbers, S...power supply circuit, 5...backup power supply, 11...control unit, llb...reset terminal, 12...constant voltage diode, 13...first Transistor, 14...Second transistor, 16.1
7.1B, 19, 20, 21...resistor, 22...switch means.

Claims

[Scope of utility model registration request]

In a reset circuit for an electronic device, etc., which is equipped with a backup means for operating a control unit when the power supply circuit is turned off when the power supply circuit is turned off, the reset circuit includes a switch means that is effective only when the power supply circuit is turned off, and a plurality of switches between the backup means and the ground. A series circuit in which resistors are connected in series, a first transistor whose input electrode is connected to a first point of the series circuit, and whose output electrode is connected to the output side of the power supply circuit, and a constant voltage element. The power supply circuit and its input electrode are connected, and one output electrode is connected to the other output electrode of the first transistor, a second point of the series circuit, and a reset terminal of the control section, and the other output electrode is connected to the power supply circuit. and a second transistor grounded, and when the control section operated by the power supply circuit or the backup means goes out of control, the switch means is turned on to output a reset pulse to the reset terminal and the control section is activated. A reset circuit characterized by resetting.