发明名称 |
Tunable phase shifter and applications for same |
摘要 |
The present invention provides a phase shifting filter and a phase compensating direct downconversion receiver. A DC offset detector detects a DC offset in a received baseband signal and provides a feedback signal. A tunable filter phase shifts a local oscillator signal responsive to the feedback signal. The phase-shifted local oscillator signal is used to directly downconvert a received RF signal, whereby DC offset in the resulting baseband signal is reduced.
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申请公布号 |
US2003194984(A1) |
申请公布日期 |
2003.10.16 |
申请号 |
US20020120938 |
申请日期 |
2002.04.10 |
申请人 |
TONCICH STANLEY S.;WALLACE RAYMOND CURTIS |
发明人 |
TONCICH STANLEY S.;WALLACE RAYMOND CURTIS |
分类号 |
H01P1/203;H03H7/01;H03H7/12;H03H7/20;H04B1/30;(IPC1-7):H04B1/26;H04B1/16 |
主分类号 |
H01P1/203 |
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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