发明名称 |
Low IF mixer with improved selectivity performance |
摘要 |
A low IF mixer and method for down-converting a signal at a desired frequency are disclosed with improved selectivity performance. The energy of sidebands on each side of the desired frequency is evaluated; and a local oscillator frequency is selected based on the evaluation of the energy. Generally, the local oscillator frequency associated with the sideband having a lower energy is selected. The desired frequency may have a frequency of RF and the sidebands have a frequency of the desired frequency plus or minus an offset frequency (RF+IF or RF-IF). The signal at the desired frequency may be multiplied by the selected local oscillator frequency to down-convert the signal.
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申请公布号 |
US2006141974(A1) |
申请公布日期 |
2006.06.29 |
申请号 |
US20040022317 |
申请日期 |
2004.12.23 |
申请人 |
CAMPBELL EDWARD E;MUJTABA SYED AON |
发明人 |
CAMPBELL EDWARD E.;MUJTABA SYED AON |
分类号 |
H04B1/26;H04B15/00 |
主分类号 |
H04B1/26 |
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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