| 摘要 |
PROBLEM TO BE SOLVED: To compose a radio circuit of the same high-frequency circuit, the wireless circuit which corresponds to an external apparatus to be connected, by making an external interface circuit and a signal processing circuit correspond to the external apparatus, even if the external apparatus to which the wireless circuit is connected, is different. SOLUTION: Connectors 19, 20 are provided between an antenna 11 and a high-frequency circuit 12, so that the antenna can be switched to an antenna which realizes optimal radio wave radiation characteristics, in an environment where a radio circuit is installed. Connectors for connection 17, 18, 15, 16 are mounted between the high-frequency circuit 12 and a signal-processing circuit 13 and between the signal processing circuit 13 and an external interface circuit 4, thereby switching the signal-processing circuit and the external interface circuit into signal-processing circuits and internal interface circuits corresponding to various external apparatuses, when connecting the wireless circuit to the external apparatuses. COPYRIGHT: (C)2005,JPO&NCIPI
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