Abstract
A 2.7V 4mW per-channel 20-bit 48kS/s sigma-delta stereo audio DAC, integrated in a 0.13mum CMOS technology, achieves a dynamic range (DR) of 101dB and occupies an active die area of 0.82mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . The transformed quantization technique is proposed to decrease tonal behavior generated in low order sigma-delta modulator and the circuit is implemented to operate with optimal current consumption. The measured SNR and peak SNDR are 102dB and 95dB, respectively
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