发明名称 |
Notch filter for DC offset reduction in radio-frequency apparatus and associated methods |
摘要 |
A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry coupled together. The receiver analog circuitry receives an RF signal. The receiver analog circuitry processes the received RF signal and generates a digital signal that it provides to the receiver digital circuitry. The receiver digital circuitry includes a digital down-converter circuitry that mixes the digital signal provided by a receiver analog circuitry with a digital intermediate frequency (IF) local oscillator signal to generate a digital down-converted signal. The receiver digital circuitry also includes a digital filter circuitry that filters the digital down-converted signal to generate a filtered digital signal. The digital filter circuitry provides a notch at a frequency that corresponds to a residual DC offset of the receiver analog circuitry.
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申请公布号 |
US7024221(B2) |
申请公布日期 |
2006.04.04 |
申请号 |
US20020075099 |
申请日期 |
2002.02.12 |
申请人 |
SILICON LABORATORIES INC. |
发明人 |
PAULUS TOD;BEHRENS RICHARD T.;SRINIVASAN VISHNU S.;SPURBECK MARK S.;KERTH DONALD A.;SCOTT JEFFREY W.;TUTTLE G. TYSON;VISHAKHADATTA G. DIWAKAR |
分类号 |
H04B1/38;H04B1/28;H04B1/40;H04B15/02;H04B15/04;H04M1/00 |
主分类号 |
H04B1/38 |
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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