Patent ID: 8195115
Filing Date: 2012-06-05
Classification: H04B,H04H

Abstract:
1. An integrated digital audio receiver operable in a analog reception mode of operation and a digital reception mode of operation, comprising: mixing circuitry configured to mix radio frequency (RF) input signals with mixing signals to down convert an audio broadcast channel to a first intermediate frequency (IF) target frequency for an analog reception mode of operation and to a second IF target frequency for a digital reception mode of operation, the first and second IF target frequencies being different, and the mixing circuitry being configured to output analog real (I) and imaginary (Q) 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 and being dependent upon the mode of operation; analog to digital conversion (ADC) circuitry coupled to receive the analog I and Q signals and to output digital I and Q signals; digital signal processing (DSP) circuitry configured to receive and digitally process the digital I and Q signals, the DSP being configured to output digital signals related to analog content within the audio broadcast channel for the analog reception mode of operation and to output digital signals related to digital content within the audio broadcast channel for the digital reception mode of operation; and control circuitry coupled to the LO circuitry and the DSP circuitry, the control circuitry being configured to select the analog reception mode of operation or the digital reception mode of operation for the integrated digital audio receiver.