Suppression of Baseline Wander and power line interference in ECG using Digital IIR Filter

--Electrocardiogram has considerable diagnostic significance, and application of ECG monitoring are diverse and in wide use. For diagnosticquality ECG recordings, signal acquisition must be noise free. The signal acquisition is susceptible to the interference from other biological and environmental sources. This article presents the application of the digital IIR filter on the raw ECG signal. The digital filters are applied to the ECG in real time manner. The filters utilized are Butterworth and elliptic notch and high pass filter. Complete design of the filters is depicted in the paper. At the end both the filter types are compared. It is found that the elliptic filter find suitable as compared to the Butterworth with some limitations. For getting real time ECG from the patient PCL 711B add on card has been used. While getting spectral response 5000 sample points of the ECG are stored for the application. Keyword-ECG, Digital Butterworth and Elliptic filter, Real time application, Noise reduction.