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<div id="wrapper"><table width="700" border="1" align="center">  <tr>       <td bgcolor="#CCCCFF" class="title">SS2-7　Regulation Characteristics of Digital Boundary Current Control DC-DC Converter</td>     </tr>     <tr>       <td class="chosha">◎Jizhe Wang，Fujio Kurokawa（Nagasaki University）</td>     </tr>     <tr>       <td class="abst">This paper presents a zero-crossing point detection method in with no delay time for boundary current mode converter. It is formed by the differential circuit and the differential amplifier circuit. In the proposed method, it is possible to detect the zero-crossing point accurately and the converter can be expected to operate under the boundary current mode exactly.</td>     </tr> </table></div>
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