发明名称 |
QUADRATURE MODULATION DEMODULATION CIRCUIT |
摘要 |
A quadrature demodulation circuit includes: first to fourth mixers to receive a modulation signal; a phase shifter to supply to the first and third mixers a first local frequency signal, to supply to the second mixer a second local frequency signal having a designated phase difference relative to the first local frequency signal, and to supply to the fourth mixer a third local frequency signal that is an inverse in phase to the second local frequency signal; a first adder to add a signal output from the first mixer and a signal output from the second mixer and to output a first demodulation signal; and a second adder to add a signal output from the third mixer and a signal output from the fourth mixer and to output a second demodulation signal.
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申请公布号 |
US2011043277(A1) |
申请公布日期 |
2011.02.24 |
申请号 |
US20100861818 |
申请日期 |
2010.08.23 |
申请人 |
FUJITSU SEMICONDUCTOR LIMITED |
发明人 |
SAKAMOTO SHINGO;MURAKAMI KOTARO |
分类号 |
H04L27/38 |
主分类号 |
H04L27/38 |
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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