Design of a Low-power Compass FIR Filter for Electrocardiogram Signals Noise Removal

In recent years, electrocardiogram measuring instruments have been developing towards miniaturization, which has also promoted the development of miniaturization of circuits and low power consumption. FIR filters are suitable for filtering out noise and revealing the obvious characteristic waveforms in an electrocardiogram, but they have high power consumption. Therefore, under the premise of maintaining stable performance and the advantages of low power consumption, this paper proposed a new architecture named the compass form FIR filter. When the high order number M = 256, the power consumption of the linear phase form was 28.2112 mW, while the power consumption of the compass form FIR was 24.0749 mW. The power consumption of the compass FIR was lower than that of the linear phase form FIR, with a difference of 4.1363 mW. Therefore, the compass form FIR filter designed in this paper had the advantages of low power consumption and high filtering performance under set conditions and high order specifications.