| 摘要 |
PROBLEM TO BE SOLVED: To operate and control a wireless device, which is driven on an external DC power supply, by an external control device, without providing a special interface. SOLUTION: The wireless device, in which an external DC power supply line is used as the interface and meaningful AC signals as data are superimposed on the line from the external control device, is provided with a circuit for demodulating the superimposed AC signals, an MPU for analyzing the demodulated signals, and a filter for eliminating the superimposed signal which becomes unnecessary for other circuits in the device. COPYRIGHT: (C)2004,JPO
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