Abstract:
设计了一种应用于音频Codec的高精度Sigma-Delta DAC,针对数字插值滤波器占用面积大的问题,提出了乘法器复用的方法,减少数字电路的硬件消耗.为解决Sigma-Delta调制器多比特量化引起的非线性问题,引入DWA(Data Weight Average)算法,提高系统的精度.此外,DCT(Direct Charge Transfer)电路用于实现数字域到模拟域的高精度转换.电路采用0.18µm CMOS工艺,整体DAC的信噪比为105.7dB@1 150Hz,有效位数达到17.26bit.
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中国集成电路
ISSN: 1681-5289
Year: 2024
Issue: 1
Volume: 33
Page: 76-81
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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