| 摘要 |
<p>Provided are a non-contact power receiving circuit which achieves small size and low heat generation, while suppressing communication error increase and transmission rate deterioration, and a non-contact power transmission system. A non-contact power receiving circuit (100) has a coil antenna (11), a rectifying circuit (12), a transformer circuit (13) and a load modulation circuit (14). The transformer circuit (13) is provided with an input smoothing capacitor (C1), a DC-DC converter (15) and a backflow preventing switch (SW1). The coil antenna (11) is coupled with a proximity electromagnetic field. The rectifying circuit (12) rectifies an output voltage of the coil antenna (11). The transformer circuit (13) transforms an output voltage of the rectifying circuit (12). The load modulation circuit (14) modulates load at the time of transmitting signals. The input smoothing capacitor (C1) smoothes an input voltage. The DC-DC converter (15) transforms an output voltage of the input smoothing capacitor (C1). The backflow preventing switch (SW1) prevents backflow of charges from the input smoothing capacitor (C1) at the time of transmitting signals.</p> |
