Patent ID: 7912437

Claim:
A radio frequency (RF) receiver, comprising: at least one amplifier for amplifying by a gain a signal received by the RF receiver, the at least one amplifier operable at any gain of a plurality of gains; a coarse DCOC system for reducing any direct current component of the signal; a fine DCOC filter for further reducing any direct current component of the signal, the bandwidth of the fine DCOC filter being dynamically controlled by the occurrence of the change in the gain of the at least one amplifier; and a fine DCOC bandwidth controller for controlling the bandwidth of the fine DCOC filter, the fine DCOC bandwidth controller including, a gain change detect logic, for detecting occurrence of the change in the gain of the at least one amplifier, and, in response, generating a pulse, a delay circuit for delaying the pulse by an amount to compensate for a propagation delay of the signal through the coarse DCOC system of the RF receiver, and for outputting a delayed pulse, control hardware including a counter, responsive to the delayed pulse, for selecting a duration of an interval during which the bandwidth of the fine DCOC filter is increased in one or more steps, and a multiplexer, coupled to the control hardware, for outputting to the fine DCOC filter an increased bandwidth setting for the interval only, and otherwise for outputting to the fine DCOC filter a low bandwidth setting, thereby controlling the bandwidth of the fine DCOC filter.