Patent ID: 8755447
Filing Date: 2014-06-17
Classification: H03M,H04L

Abstract:
1. An apparatus comprising; an in-phase/quadrature-phase (I/Q) converter receiving an input signal and converting the input signal to the digital in-phase (I) signal and the digital quadrature (Q) signal, wherein the input signal is received within a wireless audio equipment; at least one oversampling noise-shaping modulator converting (i) a digital in-phase (I) signal and a digital quadrature (Q) signal to a quantized I signal and (ii) the digital Q signal to a quantized Q signal, wherein the quantized I signal and the quantized Q signal are quantized with a desired number of quantized bits per sample, wherein the at least one oversampling noise-shaping modulator comprises a sigma-delta modulator and wherein the sigma-delta modulator comprises: at least one digital-analog converter (DAC) converting the quantized I signal and the quantized Q signal to an analog I signal and an analog Q signal, respectively; at least one filter reducing noise components of the analog I and Q signals by a predetermined level to form filtered I and Q signals; and an analog quadrature modulator transforming the filtered I and Q signals and a local oscillator signal to a transmitted output signal, wherein the transmitted output signal is transmitted to a wireless receiver.