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학술대회 A 105.5 dB, 0.49 mm2 Audio ΣΔ Modulator using Chopper Stabilization and Fully Randomized DWA
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김이경, 조민형, 김귀동, 권종기, 김종대
Custom Integrated Circuits Conference (CICC) 2008, pp.503-506
08MB1800, 유비쿼터스 단말용 부품 모듈, 김종대
An audio ZA modulator achieves 105.5 dB dynamic range over 20 kHz audio bandwidth. A chopper stabilization technique is used in both the first integrator and the reference buffer to prevent degradation of the dynamic range and the peak signal-to-noise-plusdistortion-ratio due to flicker noise. A fully randomized data weighted averaging is used as a dynamic element matching technique to suppress the generation of spurious tones with a negligible increase in the in-band noise compared to conventional data weighted averaging. The chip was fabricated in 0.13 μm CMOS technology (I/O devices) and occupies a small chip area of 0.49 mm2. The total power consumption is 9.9 mW from a 3.3 V supply. ©2008 IEEE.
KSP 제안 키워드
3 V, CMOS Technology, Chip area, Data weighted averaging, Dynamic Element Matching, I/O devices, Signal-to-Noise, Spurious tones, Total power consumption, ZA modulator, chopper stabilization