JPS61160529U

JPS61160529U -

Info

Publication number: JPS61160529U
Application number: JP4309385U
Authority: JP
Priority date: 1985-03-27
Filing date: 1985-03-27
Publication date: 1986-10-04

Description

[Brief explanation of the drawing]

第１図は本考案に係るリセツト信号及び停電信
号発生回路の実施例を示す回路図、第２図は従来
のリセツト回路を示す回路図、第３図は第１図に
おける各部の電圧波形図、第４図は第２図におけ
る各部の電圧波形図である。１：整流回路、２：積分回路、３：第１の波形
整形回路、４：積分回路、５：第２の波形整形回
路、Ｍ：マイクロプロセツサ、Ｒ：リセツト端子
、Ｔ：停電信号入力端子。 FIG. 1 is a circuit diagram showing an embodiment of the reset signal and power outage signal generation circuit according to the present invention, FIG. 2 is a circuit diagram showing a conventional reset circuit, and FIG. 3 is a voltage waveform diagram of each part in FIG. FIG. 4 is a voltage waveform diagram of each part in FIG. 2. 1: Rectifier circuit, 2: Integrating circuit, 3: First waveform shaping circuit, 4: Integrating circuit, 5: Second waveform shaping circuit, M: Microprocessor, R: Reset terminal, T: Power outage signal input terminal .

Claims

[Scope of utility model registration request]

A rectifier circuit that has a time constant smaller than that of the DC power supply and rectifies the AC power supply, an integration circuit to which the output of the rectification circuit is supplied via a diode, and a waveform shaping and reset of the output of the integration circuit. a first waveform shaping circuit that obtains a signal; a detection circuit that detects the output of the rectifier circuit; a second waveform shaping circuit that obtains a power outage signal by shaping the output of the detection circuit; and a second waveform shaping circuit that responds to the power outage signal. and a switching element that cuts off the output of the first waveform shaping circuit, and is configured to generate a reset signal when the power is turned on and to generate a power failure signal when the power is turned off. Power outage signal generation circuit.