A 20 kHz Bandwidth Resistive DAC with 135 dBA Dynamic Range and 125 dB THD

Ayman Shabra, Padraig Cooney, Adalberto Cantoni, Joshua Bamford,Stacy Ho,Michael Ashburn

2019 IEEE Custom Integrated Circuits Conference (CICC)（2019）

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摘要

We present a resistive FIR DAC targeted for audio applications with a low distortion output routing method and a current output reference. The design combines vector element selection and fixed transitioning of elements to shape mismatch errors and suppress intersymbol interference. The vector quantizer uses a variation of Hoare's selection algorithm to reduce digital hardware complexity. A prototype in 40 nm CMOS has a measured dynamic range of 135 dBA, a -124.5 dB THD+N, and a -125 dB THD.

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关键词

digital to analog converters,mismatch shaping,intersymbol interference,vector quantizer

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