| 摘要 |
<p>PURPOSE:To reduce the number of comparators and to reduce current consumption in detection switchs provided with the comparator for object detection and the one for stable operation display. CONSTITUTION:An object detection signal is outputted by a first comparator 7 for object detection. An input signal can be discriminated by switching the threshold value of the comparator 21 for stable operation detection based on the output of the object detection signal. Simultaneously, such control that the output of the comparator 21 can be inverted only when the detection signal is outputted from the comparator 7 is performed. By employing such constitution, a stable or unstable state can be displayed based on the output of the comparator 21.</p> |
