发明名称 CONTACTLESS COMMUNICATION CIRCUIT AND PORTABLE TERMINAL
摘要 The present invention provides a contactless communication circuit having both a contactless communication card function and a contactless communication reader/writer function, which includes a capacitor section that forms a parallel-resonant circuit with a contactless communication antenna; and a capacitance switching section that makes a capacitance of the capacitor section effective in a mode of the contactless communication card function, and reduces the capacitance of the capacitor section in a mode of the contactless communication reader/writer function.
申请公布号 US2008012712(A1) 申请公布日期 2008.01.17
申请号 US20070774239 申请日期 2007.07.06
申请人 SONY ERICSSON MOBILE COMMUNICATIONS JAPAN, INC. 发明人 SHIMIZU KANJIRO
分类号 G08B13/18 主分类号 G08B13/18
代理机构 代理人
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