Invention Grant
- Patent Title: Notch filter for DC offset reduction in radio-frequency apparatus and associated methods
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Application No.: US10075099Application Date: 2002-02-12
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Publication No.: US07024221B2Publication Date: 2006-04-04
- Inventor: Tod Paulus , Richard T. Behrens , Vishnu S. Srinivasan , Mark S. Spurbeck , Donald A. Kerth , Jeffrey W. Scott , G. Tyson Tuttle , G. Diwakar Vishakhadatta
- Applicant: Tod Paulus , Richard T. Behrens , Vishnu S. Srinivasan , Mark S. Spurbeck , Donald A. Kerth , Jeffrey W. Scott , G. Tyson Tuttle , G. Diwakar Vishakhadatta
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: O'Keefe, Egan & Peterman, LLP
- Main IPC: H04B1/38
- IPC: H04B1/38 ; H04M1/00

Abstract:
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.
Public/Granted literature
- US20020168951A1 Notch filter for DC offset reduction in radio-frequency apparatus and associated methods Public/Granted day:2002-11-14
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