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Improvement and Simulation Based on the Traditional CIC Filter

Nie Feng

Abstract

The reason of the conventional CIC(Cascade Intergrator Comb) filter's undesirable amplitude-frequency response is analysed,and the performance of the CIC filter is enhanced by using a cosine filter and a compensation filter respectively.It is shown in the result of simulation that the stop-band attenuation of the improved CIC filter makes 26dB better than the traditional CIC.Besides the characteristic of the pass-band is modified evidently.The features of its implementation structure suggests that the improved CIC filter is of great significance in the practical application and further study.

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Available abstract

Key concepts: Capacitor-input filter, Raised-cosine filter, Filter (signal processing), High-pass filter, Root-raised-cosine filter, Butterworth filter, Band-stop filter, All-pass filter