Patent ID: 7106809
Filing Date: 2006-09-12
Classification: H04H

Abstract:
1. A radio frequency receiver operable with a digital modulation processing system to process a radio frequency signal, the radio frequency signal including analog modulation and digital modulation, the radio frequency receiver comprising: a digital down converter circuit operable to produce a common path signal comprising the analog modulation and the digital modulation; a common path node coupled with the digital down converter circuit, wherein the common path signal is provided to the common path node as a digital signal at a first bandwidth and a first sample rate that are optimum for processing with the digital modulation processing system, wherein the common path node is configured to be selectively electrically coupled with the digital modulation processing system so that the common path signal is providable unfiltered to the digital modulation processing system to generate a second audio signal; a decimation circuit electrically coupled with the common path node, the decimation circuit operable to reduce the first sample rate to a second sample rate and reduce the first bandwidth to a second bandwidth; a demodulator circuit electrically coupled with the digital down converter circuit, the demodulator circuit operable to demodulate the analog portion of the common path signal to form a first audio signal; a combiner circuit electrically coupled with the demodulator circuit with provision to receive the second audio signal, the combiner circuit operable to selectively utilize at least one of first audio signal and the second audio signal to produce a preliminary audio output; and an audio processing circuit and a digital-to-analog conversion circuit electrically coupled with the combiner circuit, the audio processing circuit and the digital-to-analog conversion circuit operable to produce an audio output from the preliminary audio output.