发明名称 |
Harmonic rejection mixer and method of operation |
摘要 |
A radio frequency (RF) demodulation circuit comprising a harmonic rejection mixing stage capable of receiving and mixing an incoming radio frequency (RF) signal having a frequency RF and a reference local oscillator (LO) signal having a frequency LO and generating an output signal in which out-of-band harmonic signals are suppressed. The harmonic rejection mixing stage comprises 1) a multiphase local oscillator (LO) generator for receiving the reference LO signal and generating M phase-shifted local oscillator signals having frequencies LO and 2) M mixers, each of the M mixers receiving the incoming radio frequency signal and one of the M phase-shifted local oscillator signals. Each of the M mixers generates a subcomponent signal. The subcomponent signals are then scaled and combined to produce the output signal.
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申请公布号 |
US7130604(B1) |
申请公布日期 |
2006.10.31 |
申请号 |
US20020163489 |
申请日期 |
2002.06.06 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
WONG HEE;JU SHU-ING;SCHWARTZ MICHAEL;BUTLER ROBERT K. |
分类号 |
H04B1/00;H04B1/26 |
主分类号 |
H04B1/00 |
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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