ieee xplore abstract - continuous-time sigma-delta modulator design for wireless biomedical sensing...
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Continuous-time sigma-deltamodulator design for wirelessbiomedical sensing applications
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Print ISBN:
978-1-4244-6688-7
INSPEC Accession Number:
11292456
Conference Location :
Melbourne, FL
Digital Object Identifier :
10.1109/WAMICON.2010.5461869
This paper discusses the use of continuous-time sigma-delta modulators for ADCs in wireless
biomedical sensing applications. The advantages of the proposed continuous-time sigma-delta
modulators include the fact that it eliminates the need for an anti-aliasing filter in front of the ADC
because of its intrinsic anti-alias filtering property. Additionally, the use of weak inversion and a low
flicker noise structure minimizes power consumption and low frequency flicker noise. Finally, the
decimation filter used in ordinary sigma-delta ADCs to attenuate high-frequency noise is eliminated
because the biomedical sensor analyzes the periodogram in software, thus significantly reducing the
cost and power consumption. A design example illustrating these advantages is presented in this paper.
Published in:
Wireless and Microwave Technology Conference (WAMICON), 2010 IEEE 11th Annual
Date of Conference:
12-13 April 2010
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Yi Yang ; Dept. of ECE, Univ. of North Carolina at Charlotte, Charlotte, NC, USA ; Changzhi Li ; Binkley, D.M.
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