A 300-pW audio ΑΣ modulator with 100.5-dB DR using dynamic bias inverter

A micropower audio delta-sigma modulator is presented for mobile applications. The modulator employs dynamic bias inverter based integrators, which maximizes both g m /I D ratio and slew rate while compensating PVT variations. A prototype modulator implemented in a 0.18pm CMOS process features a sin...

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Bibliographic Details
Published in2018 23rd Asia and South Pacific Design Automation Conference (ASP-DAC) pp. 297 - 298
Main Authors Lee, Sangwoo, Jo, Woojin, Song, Seungwoo, Chae, Youngcheol
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2018
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Summary:A micropower audio delta-sigma modulator is presented for mobile applications. The modulator employs dynamic bias inverter based integrators, which maximizes both g m /I D ratio and slew rate while compensating PVT variations. A prototype modulator implemented in a 0.18pm CMOS process features a single-bit third-order topology. The modulator achieves 97.7dB SNDR, 98.6dB SNR, 100.5dB DR, and 105.8dB SFDR in a 20kHz audio band, while consuming only 300pW from a 1.8V supply. This corresponds to a state-of-the-art FoM of 178.7dB.
ISSN:2153-697X
DOI:10.1109/ASPDAC.2018.8297328