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An integrated multi-channel system for biomedical signal acquisition
Publikationstyp
Conference Paper
Date Issued
2011
Sprache
English
Institut
Start Page
36
End Page
45
Citation
BIODEVICES 2011 : proceedings of the International Conference on Biomedical Electronics and Devices ; Rome, Italy, January 26 - 29, 2011: 36-45 (2011)
Contribution to Conference
Scopus ID
Publisher
SciTePress
A CMOS configurable system-on-chip (SoC) for biomedical signal acquisition is described. The SoC is composed of 10 channels, each channel including a programmable analog front-end (AFE) and a 20 bit analog-to-digital converter (ADC). The digitized signals are read out via a high-speed serial communication bus. The AFE includes a common-mode rejection ratio (CMRR) calibration circuitry resulting in a CMRR of more than 80 dB and an active DC-suppression circuitry giving the DC-coupled instrumentation amplifier the possibility to tolerate DC-offsets of up to ± 1 V for a power supply voltage of 3.3 V. In low-noise mode the AFE achieves an input referred noise of less than 50 nVrms for EEG application (0.5-70 Hz) and the power consumption of a channel including AFE and ADC is less than 5 mW in low-power mode. A prototype has been fabricated in a 0.35 μm CMOS process.
Subjects
Biomedical signals
CMRR-calibration
Configurable
DC-suppression
Low-noise
Low-power
SoC
DDC Class
570: Biowissenschaften, Biologie