A full custom analog front-end for long-time ECG monitoring.

TitleA full custom analog front-end for long-time ECG monitoring.
Publication TypeJournal Article
Year of Publication2013
AuthorsWen M, Cheng Y, Li Y
JournalConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
Volume2013
Pagination3234-7
Date Published2013
Abstract

An analog front-end (AFE) used in portable electrocardiogram (ECG) monitoring devices is proposed. This AFE has included all necessary functions for the commercial applications. The core circuit consists of the instrumentation amplifier (IA), a 2(nd) order Butterworth low pass filter, and the second amplifying stage. The driven-right-leg circuit is integrated in the IA to effectively suppress the common mode interference. And the power management circuits provide a stable supply voltage, bias current and reference voltage for the other circuits. To guarantee the validity of the continuous monitoring data, the leadoff monitoring circuit is developed to monitor the connection of the leads. The chip is taped out with SMIC 0.18µm CMOS process, and the measured results show that the common mode rejection ratio (CMRR) and power supply rejection ratio (PSRR) achieve 75dB and 90dB respectively, and the equivalent input referred noise is 12µV.

DOI10.1039/c3an01437a
Alternate JournalConf Proc IEEE Eng Med Biol Soc