Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-04-04
2006-04-04
Gesesse, Tilahun (Department: 2684)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S074000, C455S088000, C455S241100
Reexamination Certificate
active
07024221
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.
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Behrens Richard T.
Kerth Donald A.
Paulus Tod
Scott Jeffrey W.
Spurbeck Mark S.
Gesesse Tilahun
Lee John J.
O'Keefe Egan & Peterman, LLP
Silicon Laboratories Inc.
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