发明名称 |
SIGNAL CONVERSION CIRCUIT OF A MOBILE COMMUNICATION TERMINAL, CONCERNED WITH TRANSCEIVING TD-SCDMA, GSM, AND DCS-BASED SIGNALS |
摘要 |
PURPOSE: A signal conversion circuit of a mobile communication terminal is provided to form a transmission path by using a switching circuit and a filter to separate a TD-SCDMA(Time Division-Synchronous CDMA) based transceiving signal from a DCS-based transceiving signal. CONSTITUTION: A diplexer(41) is connected with an antenna(40), and separates TD-SCDMA/DCS based signals from a GSM-based signal. A low pass filter(44) filters a GSM-based transmission signal. A band pass filter(45) filters a TD-SCDMA based transmission signal. A low pass filter(46) filters a DCS-based transmission signal. A switch(42) transmits the filtered GSM-based transmission signal to the diplexer(41), and transmits a GSM-based receiving signal separated from the diplexer(41) to an inner system. A switch(43) transmits the filtered DCS-based transmission signal to the diplexer(41), and transmits a TD-SCDMA or a DCS-based receiving signal separated from the diplexer(41) to the inner system.
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申请公布号 |
KR20040096387(A) |
申请公布日期 |
2004.11.16 |
申请号 |
KR20030029467 |
申请日期 |
2003.05.09 |
申请人 |
LG ELECTRONICS INC. |
发明人 |
CHOI, UNG GIL |
分类号 |
H04B1/40;(IPC1-7):H04B1/40 |
主分类号 |
H04B1/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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