| 摘要 |
This invention relates generally to methods and apparatuses for implementing cyclic return to zero techniques for digital to analog (D/A) conversion. Generally, embodiments of the invention disclose techniques for generating low-distortion continuous-time output waveforms in digital-to-analog converters (DACs) wherein the transient errors are not correlated with the DAC input signal, thereby resulting in DACs with significantly reduced nonlinear distortion. In one embodiment, a cyclic return to zero (CRTZ) digital to analog converter (DAC) includes at least two return to zero (RTZ) signal generating circuits, e.g. RTZ sub-DACs, to perform D/A conversion and a cycler, e.g. an RTZ sub-DAC cycler, to cycle between the two RTZ sub-DACs. The RTZ sub-DAC cycler cycles between the two RTZ sub-DACs such that one of the RTZ sub-DACs is active to perform D/A conversion for at least an entire sample period while the other RTZ sub-DAC is inactive.
|
