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∑Δ调制器输出码流FFT谱分析的探讨 被引量：3

The Analysis of Sigma-Delta Modulator Bit-Stream FFT
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摘要 ∑Δ调制器输出码流的频谱中含有大量高频噪声,在对其进行FFT谱分析时,需要加窗函数抑制这些高频噪声对基带噪底的泄漏。由于∑Δ调制器输出码流的噪声主要是高频噪声,因此需要滚降衰减较大的窗函数,窗函数选择不当会使其有效位数有2～6位的下降。实例表明,对于超过20bit精度的∑Δ调制器,选用Balckmanharris窗比Hanning窗更合适。 The output spectrum of Sigma-Delta Modulator contains lots of high frequency noise, which will leak into the base band. This paper put forward that only the fast-roll-down attenuating windows are suitable for Sigma-Delta Modulator FFT analysis, and the unsuitable windows will lead to 2-6 bits ENOB drops. Experiment shows that Balckmanharris window is more suitable for 20-bit Sigma-Delta Modulator than Harming window.
作者 陈建球 许俊 任俊彦
机构地区 复旦大学专用集成电路与系统国家重点实验室
出处 《微电子学与计算机》 CSCD 北大核心 2007年第5期116-119,共4页 Microelectronics & Computer
关键词 Sigma—Delta 调制器 FFT 窗函数 sigma-delta modulator , FFT window function
分类号 TN4 [电子电信—微电子学与固体电子学]
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参考文献5

二级参考文献23

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共引文献8

同被引文献35

  • 1邱兆坤,王伟,马云,陈曾平.一种新的高分辨率ADC有效位数测试方法[J].国防科技大学学报,2004,26(4):1-5. 被引量：27
  • 2崔庆林,蒋和全.高速A/D转换器测试采样技术研究[J].微电子学,2006,36(1):52-55. 被引量：10
  • 3骆丽娜,杨万全.高速ADC的性能参数与测试方法[J].实验科学与技术,2007,5(1):145-147. 被引量：23
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微电子学与计算机
2007年 第5期

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