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A full custom analog front-end for long-time ECG monitoring.
|Title||A full custom analog front-end for long-time ECG monitoring.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Wen M, Cheng Y, Li Y|
|Journal||Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference|
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.
|Alternate Journal||Conf Proc IEEE Eng Med Biol Soc|