Method and apparatus employing decimation filter f

专利名称：Method and apparatus employing

decimation filter for down conversion in areceiver

发明人：Mohamed A. Mostafa申请号：US09697190申请日：20001026公开号：US06373422B1公开日：20020416

专利附图：

摘要：A radio frequency receiver includes a mixer () for converting a radio frequencysignal into an IF signal. The IF signal is then filtered and amplified by a filter () and

automatic gain control circuit (). The filtered and amplified IF signal is then received by ananalog-to-digital converter () in order to convert the signal from an analog signal into adigital signal. The digital signal is then provided to a decimation filter () in order toconvert the digital signal into a base band signal (). The ADC () and decimation filter ()both are provided with a sampling frequency signal () which is preferably at least fourtimes greater than the IF signal. By using a decimation filter () the need for a seconddown conversion mixer is eliminated, thereby eliminating any associated noise, powerconsumption and distortion associated with using a second mixer.

申请人：TEXAS INSTRUMENTS INCORPORATED

代理人：Pedro P. Hernandez,W. James Brady, III,Frederick J. Telecky, Jr.

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