Patent ID: 7395098

Claim:
A receiver, comprising: an amplification module for amplifying a received radio frequency (RF) signal to produce an amplified RF signal; a mixer module coupled to mix the amplified RF signal with a local oscillation to produce a down converted signal having a specified frequency; a filter module operably coupled to receive and to filter the down converted signal to produce a filtered signal; an analog-to-digital (A/D) converter module coupled to receive the filtered signal, the A/D converter module for converting the filtered signal from an analog form to a digital form, the A/D converter generating a digital bit stream; a processing module coupled to receive and process the digital bit stream; logic circuitry coupled to power down at least a portion of one of the amplification module, the mixer module, the bandpass filter module, the A/D converter module, and the processing module during a specified mode of operation and coupled to power up any module powered down during the specified mode of operation once the receiver ceases to be in the specified mode of operation; and a bias filtering module coupled to at least one of the amplification module, the mixer module, the bandpass filter module, the A/D converter module and the processing module to provide therefor one of a plurality of bias levels on a voltage dependent filter function, wherein the bias filtering module provides an initial bias level, relative to a trigger event, for enabling fast power up and further provides a final bias level for improved filtering.