A new multistage running-sum decimator

This paper presents a new running-sum decimator for an even decimation factor. The decimator is designed as a cascade of an integrator and a differentiator making it possible to move the integrator section to a lower rate, which is half of the high input rate. The structure consists of three main sections: a cascade of first-order moving average filters, a cascade of integrators and a cascade of differentiators. With the aid of polyphase decomposition, the polyphase subfilters of the first section can be operated at a still lower rate.