Start circuit

摘要

The present invention is relative to a starter circuit for starting and re-starting a main circuit (20) in startup and during the unusual operation of the main circuit. The starter circuit includes a startup signal supplying unit (11) for supplying a stop signal for stopping the operation of the main circuit when the standby signal is at a standby level, supplying a startup signal to a circuit startup node (22) of the main circuit when the standby signal is changed from the standby level to the startup level and for halting the supply of the stop signal. The starter circuit also includes a start controlling means (12) for halting the supply of the startup signal to the startup signal supply unit when the standby signal is in the startup level and the voltage of the voltage monitor node (21) of the main circuit (20) has reached a predetermined value, and a re-start signal generating means (13) for supplying a re-start signal to the circuit startup node (22) of the main circuit when the standby signal is in the startup level and when the voltage of the voltage monitor node (21) of the main circuit is varied to an unusual value.