Patent ID: 6862439
Filing Date: 2005-03-01
Classification: H03D,H04B

Abstract:
1. A baseband processing assembly capable of compensating received and demodulated differential signals in at least one channel of a direct conversion receiver for DC offset, wherein, for each of the at least one channel, said baseband processing assembly comprises: a baseband amplifier capable of amplifying the demodulated differential signals; a variable-gain amplifier capable of receiving and further amplifying the amplified demodulated differential signals from said baseband amplifier; a pair of dynamic offset compensation elements each comprising a capacitor, wherein one dynamic offset compensation element is electrically connected to said baseband amplifier and the other dynamic offset compensation element is electrically connected to said variable-gain amplifier, wherein said dynamic offset compensation elements are capable of compensating at least a portion of dynamic offset from the demodulated differential signals at the respective amplifier; and a static offset compensation element electrically connected to said variable-gain amplifier opposite said baseband amplifier, wherein said static offset compensation element is capable of receiving a differential control code representative of static offset and thereafter compensating at least a portion of static offset from the further amplified demodulated differential signals based upon a combination of the differential control code with the further amplified demodulated differential signals from the variable-gain amplifier.