Patent ID: 6606359
Filing Date: 2003-08-12
Classification: H03F,H03K,H04L

Abstract:
A receiver for receiving and processing a radio frequency signal using an area-optimum rapid acquisition cellular multi-protocol digital dc offset correction scheme within a radio communication system, the receiver comprising:a receiver antenna for receiving the radio frequency signal; a radio frequency frontend coupled to the receiver antenna for receiving the radio frequency signal and for generating a desired signal; a post mixer amplifier coupled to the radio frequency frontend receiving the desired signal and for generating a post mixer amplifier output; a first anti-alias filter coupled to the post mixer amplifier for generating a first anti-alias filter output; a summing junction coupled to the first anti-alias filter for receiving the first anti-alias filter output and an offset correction signal and for generating a combined intermediate frequency signal; an intermediate frequency amplifier circuit coupled to the summing junction for receiving the combined intermediate frequency signal and for generating an intermediate frequency amplifier output; a second anti-alias filter coupled to the intermediate frequency amplifier circuit receiving the intermediate frequency amplifier output and for generating a second anti-alias filter output; an analog to digital converter coupled to the second anti-alias filter for receiving the second anti-alias filter output and for generating a most significant bit and a least significant bit; and a digital DC offset correction circuit coupled between the analog to digital converter and the summing junction, for receiving the least significant bit and for generating the offset correction signal.