| 摘要 |
PURPOSE:To prevent equipment from being uncontrolled due to a noise on the part of a reader code by detecting the cycle of an inputted noise, and masking the noise when the cycle is constant. CONSTITUTION:Firstly, the cycle of a pulse fetched in a control part 3 is detected by sampling, and it is detected whether or not the cycle is constant. When it is constant, only a signal masking the pulse with the cycle is fetched. Such masking processing can be realized by a processing that signal fetch at a timing predicting the arrival of the pulse is suspended, and a signal level just before is held during that timing. Consequently, a noise component with the noise of constant cycle is not handled as the noise even when it is inputted actually. In such a manner, remote control light can be always fetched normally. |
