Patent ID: 7463864

Claim:
A communication device, comprising: one or more circuits in an integrated transmitter and receiver, wherein said one or more circuits enable direct signal up-conversion and/or direct signal down-conversion, said one or more circuits operable to: transmit a communication signal via a transmit path comprising an I processing baseband transmit path and a Q processing baseband transmit path; and receive a communication signal via a receive path comprising an I processing baseband receive path and a Q processing baseband receive path, wherein: a first common filter is shared by said I processing baseband transmit path and said I processing baseband receive path; and a second common filter is shared by said Q processing baseband transmit path and said Q processing baseband receive path, wherein said first common filter and said second common filter are independently programmable to adjust a phase and/or a gain of said first common filter, and/or a phase and/or a gain of said second common filter.