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Low-power switched-capacitor delta-sigma modulator for EEG recording applications

Chen Jin, Zhang Xu and Chen Hongda

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Abstract: This paper presents a third-order single-loop delta-sigma modulator of a biomedical micro-system for portable electroencephalogram (EEG) monitoring applications. To reduce the power consumption, the loop filter of the proposed modulator is implemented by applying a switched-capacitor structure. The modulator is designed in a 0.35-μm 2P4M standard CMOS process, with an active area of 365 × 290 μm2. Experimental results show that this modulator achieves a 68 dB dynamic range with an input sinusoidal signal of 100 Hz signal bandwidth under a 64 over-sampling ratio. The whole circuit consumes 515 μW under a 2.5 V power supply, which is suitable for portable EEG monitoring.

Key words: analog-to-digital converter

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    Received: 18 August 2015 Revised: 07 February 2010 Online: Published: 01 July 2010

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      Chen Jin, Zhang Xu, Chen Hongda. Low-power switched-capacitor delta-sigma modulator for EEG recording applications[J]. Journal of Semiconductors, 2010, 31(7): 075009. doi: 10.1088/1674-4926/31/7/075009 Chen J, Zhang X, Chen H D. Low-power switched-capacitor delta-sigma modulator for EEG recording applications[J]. J. Semicond., 2010, 31(7): 075009. doi:  10.1088/1674-4926/31/7/075009.Export: BibTex EndNote
      Citation:
      Chen Jin, Zhang Xu, Chen Hongda. Low-power switched-capacitor delta-sigma modulator for EEG recording applications[J]. Journal of Semiconductors, 2010, 31(7): 075009. doi: 10.1088/1674-4926/31/7/075009

      Chen J, Zhang X, Chen H D. Low-power switched-capacitor delta-sigma modulator for EEG recording applications[J]. J. Semicond., 2010, 31(7): 075009. doi:  10.1088/1674-4926/31/7/075009.
      Export: BibTex EndNote

      Low-power switched-capacitor delta-sigma modulator for EEG recording applications

      doi: 10.1088/1674-4926/31/7/075009
      • Received Date: 2015-08-18
      • Accepted Date: 2009-09-18
      • Revised Date: 2010-02-07
      • Published Date: 2010-07-05

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