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• W3197933154 abstract "In many applications of notch filtering, short transient response and high quality factors are very important issues. Increasing Q factor, decreases the bandwidth and improves magnitude selectivity near the notch frequency, but unfortunately increases the transient duration of the response. Recently, time-variant methods using exponential or sigmoid functions are considered to enhance the notch filter performance. In this paper, conventional and feedback-structured notch filters (following a recent work by Pei et al) are investigated in details. Using feedback structure, anyone can obtain a good narrow-band notch filter by tuning the feedback gain. However, it suffers from a long transient duration. In order to improve the performance of the filter, a new simple time-variant method to control the pole-position is introduced. Proposed method can keep the pole radius in the minimum value to decrease the transient duration more efficiently than other recently-reported ones as Piskorowski, Li and Rana methods. Also, it drives the pole to approach the unit circle or final position rapidly, normally after a few samples, while attaining a narrow bandwidth. In this paper, the performance of the proposed filter is compared with Piskorowski, Li and Rana methods. Simulation results show that the proposed algorithm can improve the performance of the feedback-structured filter compared to other methods. The results demonstrate superior performance of the presented method not only in accordance with power line interference, but also in removing the distortion of the time-variant filters." @default.
• W3197933154 created "2021-09-13" @default.
• W3197933154 creator A5060469191 @default.
• W3197933154 creator A5085920088 @default.
• W3197933154 date "2022-01-01" @default.
• W3197933154 modified "2023-10-18" @default.
• W3197933154 title "Design of feedback-structured IIR notch filter with transient suppression using gain variation" @default.
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• W3197933154 doi "https://doi.org/10.1016/j.bspc.2021.103075" @default.
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