Patent ID: 7899431

Claim:
A method in radio frequency (RF) receiver circuitry having a warmup period and a receive path associated therewith and including a baseband analog gain control stage having a gain and a baseband path associated therewith, the method comprising the step of: performing, within a feedback loop that includes a digital loop filter, a DC correction calculation operation during the warmup period to derive a DC correction value having a first component and a second component for the baseband analog gain control stage, wherein the step of performing a DC correction calculation operation during the warmup period comprises the steps of: causing an input to the baseband analog gain control stage to be grounded; performing a first closed loop correction of the baseband path to derive the first component of the DC correction value, wherein the first component of the DC correction value is a first DC offset value located at an output of the digital loop filter while the input is grounded; causing the input of the baseband analog gain control stage to be connected to a mixer; and performing a second closed loop correction of the receive path as a function of the gain during the warmup period to derive the second component of the DC correction value, wherein the second component of the DC correction value is a second DC offset value located at the output of the digital loop filter while the input is connected to the mixer.