SAR-based delta-sigma modulator using single-bit shared-DAC
Electronics Letters （2014）
摘要
A new single-bit ΔΣ modulator based on multi-bit quantisation and a successive approximation (SA) algorithm with improved output swing due to a reduced quantisation noise power is presented. Although this structure maintains the linearity of the single-bit digital-to-analogue converter (DAC), it also removes the requirement for a high slew rate operational amplifier. Hence, the modulator dissipates less power.
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关键词
delta-sigma modulation,δς modulator,sar-based delta-sigma modulator,digital-to-analogue converter,multibit quantisation,quantisation noise power reduction,single-bit shared-dac,successive approximation register,delta sigma modulation
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