发明名称 |
Mixer circuit for direct conversion transceiver with improved second intermodulation product |
摘要 |
<p>A mixer for direct conversion transmitters and receivers using four phase-shifted local oscillation signals that are orthogonal each other to control a plurality of switches for outputting signals that are orthogonal each other. Two output signals that are orthogonal to each other do not mutually interfere and have a predetermined small signal gain. Further, a mixer may include four or eight switches controlled by four phase-shifted local oscillation signals that are orthogonal each other for outputting signals that are orthogonal to each other on an I-Q plot. The signals outputted from the switches controlled by four phase-shifted local oscillation signals remove I-Q mismatch and a DC component, and improve IP2 characteristics. <IMAGE> <IMAGE></p> |
申请公布号 |
EP1560326(B1) |
申请公布日期 |
2008.09.24 |
申请号 |
EP20050250511 |
申请日期 |
2005.01.31 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM, YOUNG-JIN |
分类号 |
H03D7/14;H04B1/30;H03C3/40 |
主分类号 |
H03D7/14 |
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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