| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact infrared human body detector, having a function for suppressing the effect of popcorn noise. SOLUTION: In a controller 7 for controlling a human body detecting operation upon detection of popcorn noise, a pulse generator circuit for outputting a pulse signal corresponding to a specified time comprises a switch circuit 9 for executing a switching operation against popcorn noise detection signal, a charging-discharging part (R1, C1) composed of a resistive component (R1) and a capacitive component (C1) for charging and discharging according to the operation of the switch circuit 9, and an inverter 8 for shaping a signal waveform generated by the switch circuit 9 and the charging-discharging part (R1, C1). The resistive component (R1) is composed of a switched capacitor. |
