A 20-bit stereo D-to-A converter is realized using 4th-order del ta-sigma oversaw1 ing technology. llOdB S/N ratio and 0.002% harionic distortion are measured at PDM output signal employing an oversaapling ratio of 128. The chip operates with single 2.7V power supply and CO sumes 33ml. It is implemented in technology. a 3.2 X 4.0" ! ! chip area with using 0.8um CMOS
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