Digital-to-Analog Converter

摘要

An apparatus and method for digital-to-analog conversion. A digital-to-analog converter includes a sampler for resampling a digital signal and a DAC array. The DAC array includes a sequencer, a unit element activator, and an array of one-bit DACs (unit elements). The unit elements are activated in a cyclical sequence, based on the resampled digital signal. Unit elements in the sequence may be skipped, based on a disruption probability. The disruption probability may be determined randomly, or pseudo-randomly. Output signals of the unit elements are summed or averaged to form an analog signal. The converter may include a filter to filter the analog signal.

主权项

1. A digital-to-analog converter, comprising:
a sampler for resampling a digital signal which is quantized at a first resolution and synchronized at a first sampling rate to provide a resampled digital signal which is quantized at a second resolution lower than the first resolution and synchronized at a second sampling rate higher than the first sampling rate; and a DAC array for converting the resampled digital signal to an analog signal, the DAC array including an array of unit elements that are configured to: (i) be activated in accordance with a cyclical sequence which is probabilistically disrupted; and (ii) upon activation contribute substantially equally to the analog signal.