Research in Digital Filters for Oversampled Converters

Design of digital filters for A/D and D/A converters was discussed. Based on the halfband filter's character of symmetrical impulse response, new algorithm for multiplyadd block and change of the mode of memory addressing, it come at low filter's power consumption and high calculation speed. The experiment results show that the steps of shift and number of adders are decreased, and the efficiency of hardware usage highly increased.