| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control circuit of an inverter device capable of properly avoiding influence of noise in accordance with characteristics of actual noise generated. <P>SOLUTION: Sampling means samples a binary level signal given to an input terminal every fixed cycle, and the sampled dada values are stored in storage means. Noise information detecting means detects a noise generating cycle Tw estimated as a change in the data values caused by generation of noise and a noise sustained period Th in which the state of change in the data values continues, based on a length of a period of time in which a [0] continues and a length of a period of time in which a [1] continues in the data values stored in the storage means, after operation of the sampling means lasts for a prescribed period of time. Sampling setting means sets a cycle Tin for sampling data during normal processing and/or a frequency Rn of continuously sampling the data every sampling cycle Tin based on the noise generating cycle Tw and the noise sustained period Th so as to avoid influence of noise. <P>COPYRIGHT: (C)2012,JPO&INPIT |
