Patent ID: 7949319
Filing Date: 2011-05-24
Classification: H04B,H04H

Abstract:
1. An integrated digital audio receiver, comprising: mixing circuitry configured to mix radio frequency (RF) input signals with mixing signals to down convert audio broadcast channels within the RF signals to one or more target frequencies and to output analog real (I) and imaginary (Q) signals, the RF signals including one or more audio broadcast channels having digital audio signals; local oscillator (LO) circuitry configured to provide the mixing signals to the mixing circuitry, the mixing signals being dependent upon an audio broadcast channel to be tuned; first analog to digital conversion (ADC) circuitry coupled to receive the analog I/Q signals and to output a first set of digital I/Q signals; second analog to digital conversion (ADC) circuitry coupled to receive the analog I/Q signals and to output a second set of digital I/Q signals; and digital signal processing (DSP) circuitry configured to receive and digitally process the first set of digital I/Q signals, and to receive the second set of digital I/Q signals; wherein the second ADC circuitry is configured to be turned off for at least one mode of operation.