A 16 bit Stereo Audio ∑△ A/D Converter
A 16 bit Stereo Audio ΣΔ A/D Converter
Chen Lei,
Zhao Yuanfu,
Gao Deyuan,
Wen Wu,
Wang Zongmin,
Zhu Xiaofei,
Chen Lei,
Zhao Yuanfu,
Gao Deyuan,
Wen Wu,
Wang Zongmin,
Zhu Xiaofei
Keywords: ∑△A/D转换器,开关电容,稳定性,抽取滤波器,带隙基准电路,∑△,A/D,converter,switched,capacitor,stability,decimation,filter,bandgap,circuits,转换器,Audio,Stereo,chip,area,CMOS,technology,peak,dynamic,range,multistage,used,front,modulator,method,stabilization,high,order,single,stage,bandgap,circuit,decimation,filter
Abstract:
提出了一种16位立体声音频新型稳定的5阶∑△A/D转换器.该转换器由开关电容∑△调制器、抽取滤波器和带隙基准电路构成.提出了一种新的稳定高阶调制器的方法和一种新的梳状滤波器.采用0.5μm 5V CMOS工艺实现∑△A/D转换器.∑△A/D转换器可以得到96dB的峰值SNR,动态范围为96dB.整个芯片面积只有4.1mm×2.4mm,功耗为90mW.
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