TY - GEN
T1 - Continuous-time sigma-delta modulator design for wireless biomedical sensing applications
AU - Yang, Yi
AU - Li, Changzhi
AU - Binkley, David M.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
KW - Analog-to-digital converter
KW - Biomedical applications
KW - Flicker noise
KW - Non-contact
KW - Sigma-delta modulator
KW - Wireless sensor
UR - http://www.scopus.com/inward/record.url?scp=77953074972&partnerID=8YFLogxK
U2 - 10.1109/WAMICON.2010.5461869
DO - 10.1109/WAMICON.2010.5461869
M3 - Conference contribution
AN - SCOPUS:77953074972
SN - 9781424466887
T3 - 2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
BT - 2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
T2 - 2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
Y2 - 12 April 2010 through 13 April 2010
ER -