A Low-Offset Low-Noise Sigma-Delta Modulator with Pseudorandom Chopper-Stabilization Technique

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题名:	A Low-Offset Low-Noise Sigma-Delta Modulator with Pseudorandom Chopper-Stabilization Technique
作者:	Chen, Hsin-liang;Chen, Po-sheng;Chiang, Jen-shiun
关键词:	Delta-sigma modulation;Low-frequency noise;Circuit noise;Noise cancellation;1f noise;Sampling methods;Noise reduction;Signal to noise ratio;Voltage;Switched capacitor circuits
日期:	2009-03-24
上传时间:	2025-04-28 12:05:23 (UTC+8)
出版者:	IEEE
摘要:	This paper presents a low-offset low-noise sigma-delta modulator with pseudorandom chopper-stabilization technique. The comparison of the noise-cancellation ability with the correlated double sampling and chopper-stabilization techniques is demonstrated; also, the noise performance of these cancellation techniques is observed and discussed. Using the proposed technique, the modulator achieves 92 dB of dynamic range and -135 dB of noise floor while consuming 950 ¿W from a 3-V supply. Based on the experimental results, the pseudorandom chopper-stabilization technique has a DC offset voltage that is 6 dB lower than that of the chopper-stabilization technique, and retains a thermal noise floor that is 1.6 dB lower than that of the correlated double sampling technique.
關聯:	IEEE Trans. on Circuit and System – I: Regular Papers 56(12),　p.2533-2543
DOI:	10.1109/TCSI.2009.2018922
显示于类别:	[電機工程學系暨研究所] 期刊論文

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