| 摘要 |
<p>The contactless power reception circuit (100) includes a coil antenna (11), a rectifying circuit (12), a voltage transforming circuit (13) and a load modulation circuit (14), wherein the voltage transforming circuit (13) includes an input smoothing capacitor (C 1 ), a DCDC converter (15) and a backflow prevention switch (SW 1 ). The coil antenna (11) is coupled with adjacent electromagnetic field. The rectifying circuit (12) rectifies output voltage transmitted from the coil antenna (11). The voltage transforming circuit (13) transforms output voltage from the rectifying circuit (12). The load modulation circuit (14) conducts a load modulation while signals are transmitted. An input smoothing capacitor (C 1 ) smooths an input voltage. The DCDC converter (15) transforms output voltage from the smoothing capacitor (C 1 ). The backflow prevention switch (SW 1 ) prevents backflow of a charge from the input smoothing capacitor (C 1 ) while the signals are transmitted.</p> |
