| 摘要 |
PURPOSE:To reduce noise of a signal with one terminal per one signal by providing a signal processing circuit comparing a potential of an input terminal with 1st and 2nd threshold levels and outputting a potential in response to the level or change and providing a resistor between an output of the circuit and the input terminal. CONSTITUTION:A low level is outputted from an output terminal 14 of a signal processing circuit 13 when a potential of an input terminal 12 is lower than a 1st threshold level V1, and a high level is outputted when the level of the input terminal 12 is higher than a 2nd threshold level V2 (V1<V2). When the potential of the output terminal 14 is at a low level and the potential of the input terminal 12 changes from a potential lower than the level V1 to a potential higher than the level V1, the potential of the output terminal 14 changes to a high level. When the potential of the output terminal 14 is at a high level, the circuit is operated conversely and the potential of the output terminal 14 changes to a low level. Thus, the noise component of the input signal is reduced and when a noise elimination circuit is integrated, the noise component is reduced with one terminal per one signal. |
