SIGNAL CONVERSION SYSTEM AND METHOD

摘要

A signal conversion system and method for converting an input signal to a pulse width modulated signal is disclosed. The signal conversion system includes a sample rate converter coupled with an associated pulse width modulation (PWM) module. A hardware and power efficient signal conversion system for resampling an audio input signal with an arbitrary sample rate to a pulse width modulated output audio signal for use in an audio processor and/or reproduction is disclosed. The signal conversion system may be particularly suitable for use in a battery operated consumer electronics device.

主权项

1. A signal conversion system for converting an input signal to a pulse width modulated (PWM) output signal comprising:
a clock source for generating and/or for accepting a clock signal; a carrier generator configured to generate a carrier signal with a carrier signal frequency; a cross-point section (CPS) block comprising a CPS comparator to compare the carrier signal to the input signal or a signal derived therefrom to produce a triggered signal based on the comparison and the input signal or the signal derived therefrom; a noise shaper configured to bit depth reduce the triggered signal to form a truncated signal; and a PWM comparator configured to compare the truncated signal and/or a signal generated therefrom with the carrier signal to produce the PWM output signal.