题目/Title：一种用于音频系统单环多比特ΔΣ D/A的设计
                        A single-loop multi-bit high resolution ΔΣ D/A for audio system

作者/Author：井光超,李冬梅
                        Guangchao Jing,Dongmei Li

期刊/Journal：半导体技术 Semiconductor Technology

年份/Issue Date：2009

卷（期）及页码/Volume（No.）&pages：Vol.34, No.10, pp. 1027 - 1031

摘要/Abstract：
在1.8电压下，使用UMC 0.18混合信号工艺，设计实现了一个用于音频系统的19位20数模转换器(DAC)，其中包括了一个单环多比特调制器和一个用于平滑效果的开关电容滤波器(SCF)；仿真结果表明，在64倍过采样率、5bit信号量化时，DAC能够实现17.22bit的转换精度，模拟电路部分功耗只有6.9mW，考虑到数字部分，功耗和品质因素(FOM)值不会大于3；芯片版图面积约为1.41.6。关键词: DAC; 调制器; 开关电容滤波器; FOM
A 19bit 20digital to analog convertor(DAC) is designed in UMC 0.18um CMOS technology with 1.8V power supply. The DAC includes a single-loop multi-bit ΔΣ modulator and a switched capacitor filter. According to the simulation in spectre-verilog, it can realize 17.22 bit resolutions under 64 times over-sample ratio while in 5-bit quantization. The power used in analog part is only 6.9mW, considering digital part’s consumption, FOM value is smaller than 3 pJ/step; The whole chip size including PADs is 1.4mm1.6mm.Key words: DAC, ΔΣ modulator, SCF, FOM