发明名称 |
Digitally controlled filter tuning for WLAN communication devices |
摘要 |
A digitally controlled filter tuning method and corresponding WLAN (Wireless Local Area Network) communication devices and integrated circuit chips are provided. A WLAN communication signal is filtered by a tunable filter. A cut-off frequency of the tunable filter is tuned by a feedback loop. Tuning the cut-off frequency includes comparing by a comparator an output signal emitted by the tunable filter to a reference signal and emitting by the comparator a comparator signal indicative of the difference between the output signal and the reference signal. Further, tuning the cut-off frequency comprises receiving the comparator signal by a tuning controller and setting by the tuning controller the cut-off frequency of the tunable filter based on the comparator signal by applying a digital tuning word to the tunable filter. The described filter tuning technique may reduce product and manufacturing costs while providing enhanced tuning accuracy.
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申请公布号 |
US2005265401(A1) |
申请公布日期 |
2005.12.01 |
申请号 |
US20040970266 |
申请日期 |
2004.10.21 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
BOLDT JUERGEN;KLUGE WOLFRAM;BEYER SASCHA |
分类号 |
H03H11/12;H03L7/00;H04L12/28;H04L27/10;(IPC1-7):H03L7/00 |
主分类号 |
H03H11/12 |
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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