| 摘要 |
PURPOSE:To heighten a usefulness in a practical use by permitting the FM transmission of a sound signal inputted from an external input terminal. CONSTITUTION:The sound signals inputted from a sound multiplexing demodulation circuit 1 and an external signal input terminal 5 are inputted to an input signal switching circuit 2. The signals inputted to the input signal switching circuit 2 are selected optionally by an input switching signal. The sound signal selected by the input switching signal is supplied to an FM transmission circuit 3, and is FM-transmitted to an outside from an antenna. In this way, it is possible that the sound signal inputted from the external signal input terminal is also FM-transmitted.
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