Pulse or digital communications – Receivers
Reexamination Certificate
2011-04-26
2011-04-26
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
C375S317000, C375S319000, C375S345000, C375S346000, C330S129000, C455S234100, C455S253200, C455S234200, C455S324000, C455S232100, C341S118000
Reexamination Certificate
active
07933361
ABSTRACT:
A hybrid structure circuit for the cancellation of both Type-I and Type-II DC offsets. It comprises a static compensator in conjunction with a servo-loop feedback amplifier to suppress the undesired DC components present along the path of the base band after the direct conversion mixer. Two mixers are used to down convert a received RF signal directly to a base band signal with two components: in-phase and quadrature-phase. Both in-phase and quadrature-phase branches employ the same circuitry for DC offset cancellation. Miller effect is also utilized in the structure in order to implement the circuit on-chip.
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Chuan Chia-So
Huang Kuang-Hu
Peng Wei-Chung
Integrated System Solution Corp.
J.C. Patents
Liu Shuwang
McKie Gina
LandOfFree
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