CHEN Jian-bin, ZHOU Qiang, TAN Xiao, et al. The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator[J]. Acta Electronica Sinica, 2015, 43(7): 1413-1417.
CHEN Jian-bin, ZHOU Qiang, TAN Xiao, et al. The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator[J]. Acta Electronica Sinica, 2015, 43(7): 1413-1417. DOI: 10.3969/j.issn.0372-2112.2015.07.025.
The Delta-Sigma modulator (DSM) can get a better performance by increasing the quantizer's levels.But the multi-level DSM output cannot drive the switching amplifier directly due to the structural restrict of switching amplifier.By using the equalarea theory
a level-transform strategy is proposed and analyzed in this paper.With an appropriate level-transform scheme
the transformed DSM output obtains a much better SNR performance compared to the origin 2-level output.