| 摘要 |
An operation controller has a reference voltage generator, a starter circuit, and a switch element. The reference voltage generator is connected to an enable terminal to which an enable signal is supplied. After the enable signal is supplied and a start signal is generated, the reference voltage generator generates a reference voltage up to a stable value. After the reference voltage rises to the stable value, it generates a stop signal. When the enable signal is supplied, the starter circuit generates the start signal, and supplies it to the reference voltage generator. When the enable signal is no longer supplied or the stop signal is generated, the start signal is terminated. The switch element has one end connected to the enable terminal and the other end supplied with a prescribed voltage; it turns on when the start signal is generated, and turns off when the start signal is terminated.
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