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Highly sensitive biomedical amplifier with cmrr calibration and dc-offset compensation
Publikationstyp
Conference Paper
Date Issued
2009
Sprache
English
Author(s)
Start Page
152
End Page
155
Article Number
5167621
Citation
IEEE EUROCON 2009 : EUROCON '09 ; [international conference devoted to the 150th anniversary of Alexander Popov] ; St. Petersburg, Russia, 18 - 23 May 2009. - Art. no. 516621 (2009)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
IEEE
ISBN
9781424438617
To cover a wide range of biomedical applications, the presented instrumentational amplifier (INA) for acquisition of biomedical signals is adjustable regarding power consumption and noise. In addition, DC-offsets larger than & 500 mV resulting from electrochemical potentials of the electrodes can be compensated by applying a voltage to an additional input. To achieve a high common mode rejection ratio (CMRR) of more than 80 dB, a digitally controlled calibration circuitry has been integrated. The novel concept of calibrating the CMRR in the high resistive feedback loop of an opamp and the DC electrode potential suppression does not require any external components. The INA has been fabricated in a 350 nm CMOS technology. © 2009 IEEE.
Subjects
Calibration
CMRR
DC-OFFSET
ECG
EEG
DDC Class
621.3: Electrical Engineering, Electronic Engineering