| 摘要 |
<p>PROBLEM TO BE SOLVED: To allow a transmitter with a simple circuit structure to generate a transmission signal spread over a wide frequency band and to simplify the circuit structure of a receiver. SOLUTION: The remote control signal transmitter uses a vibrator 31 to send a modulated signal in air as a radio wave. The vibrator 31 has plural surface acoustic wave elements 311, 312. The resonance frequencies f1, f2 of the surface acoustic wave elements 311, 312 differ from each other but are close to each other. Thus, the transmission signal diffused over a wide frequency band is generated with a simple circuit configuration.</p> |
