Telecommunications – Transmitter – Frequency conversion
Reexamination Certificate
2005-03-31
2008-05-20
Nguyen, Duc M (Department: 2618)
Telecommunications
Transmitter
Frequency conversion
C455S108000, C455S110000, C455S112000, C455S076000, C455S114100, C332S123000, C332S159000
Reexamination Certificate
active
07376399
ABSTRACT:
Mixing circuitry for quadrature processing in communication systems and related methods are disclosed. The weighted mixing circuitry allows for arbitrary dividers to be utilized in generating the mixing signals for quadrature processing and thereby provides a significant advantage over prior architectures where 90 degree offset I and Q mixing signals were needed for quadrature mixing.
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Pct International Search Report; PCT/US2005/022397; Jun. 23, 2005.
Wang Caiyi
Welland David R.
Nguyen Duc M
O'Keefe, Egan Peterman & Enders LLP
Silicon Laboratories Inc.
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