| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To acquire larger power supply from a radio power wave in a radio transmitter/receiver. <P>SOLUTION: A power supply circuit 22 comprises a smoothing circuit 24 for smoothing the burst of prescribed period included in a received signal and generating a pulse-like signal of that period, a booster circuit 26 including a transformer for boosting the pulse-like signal, and a capacitor 38 for storing the power of the signal boosted by the booster circuit 26, and uses the power stored in the capacitor 38 as at least part of the power of the power supply of a transmission processing part. In this way, possibility that the transmission processing part can be driven becomes higher by storing the power in the capacitor and using it as the power supply even in a situation that only comparatively weak radio power waves can be received. That is, a communicable area (response-possible area) of the radio transmitter/receiver is further extended. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
