| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical motion sensor that can easily and reliably detect movements of humans in environments widely different in brightness in a relatively simple circuit configuration. <P>SOLUTION: A light receiving element 15 and a voltage equalization circuit 21 are connected in series and the connection point between the light receiving element 15 and the voltage equalization circuit 21 is connected to a signal output terminal 39 via a differential amplification circuit 31 and a pulse shaping circuit 37 to form a circuit configuration. The voltage equalization circuit comprises an emitter-grounded transistor, a capacitor inserted between the base and emitter of the transistor and a resistor inserted between the base and collector of the transistor, and the collector of the transistor is connected to the light receiving element. <P>COPYRIGHT: (C)2012,JPO&INPIT |
