A multibit delta-sigma audio DAC with 120-dB dynamic range

被引：35
作者：
Fujimori, I [1 ]
Nogi, A [1 ]
Sugimoto, T [1 ]
机构：
[1] AKM Semicond, San Diego, CA 92131 USA
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2000年 / 35卷 / 08期
关键词：
delta-sigma modulation; digital-analog conversion; operational amplifiers; switched-capacitor circuits;
D O I：
10.1109/4.859495
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A 24-bit 192-kHz sample-rate digital-to-analog converter (DAC) achieves 120-dB A-weighted dynamic range in the 20-kHz band, and consumes 310 mW with a 5-V power supply. A third-order five-bit Delta Sigma architecture optimized for high-end consumer audio has been developed and used. A switched-capacitor (SC) DAC combined with infinite-impulse response (IIR) and finite-impulse response (FIR) filters is employed to increase immunity to clock jitter, and reduce analog power. Partial-range dynamic element matching (DEM) enhances mismatch shaping with reduced circuit overhead. The 7.8-mm(2) chip fabricated in 0.5-mu m CMOS integrates a stereo DAC and all functions required for DVD-audio playback.
引用
收藏
页码：1066 / 1073
页数：8
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