| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for monitoring tire conditions that has been highly reliable to noise conventionally. SOLUTION: The device 20 can remove noise received with a button battery 30 as an antenna by providing choke coils 35, 35 in a pair of power lines 31, 32 for connecting the button battery 30 and an electric circuit 23, thus improving reliability to noise as compared with before. The electric circuit 23 is arranged on a circuit board 22 by avoiding the true back of a part where the choke coils 35, 35 are packaged in the circuit board 22, thus controlling the effect of noise radiated from the choke coils 35, 35 to the electric circuit 23. COPYRIGHT: (C)2007,JPO&INPIT
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