Digital decimation filter and method for achieving fractional data rate reduction with minimal hardware or software overhead

摘要: An analog-to-digital converter is provided for producing digital signal representative of analog signals. Noise induced upon the signals can be substantially removed using a decimation filter. The filter includes front-end portion which receives data at relatively high sample rate and performs filtering operations with minimal complexity. Preferably, least one stage more preferably two stages, each perform interpolation separate from decimation. According to embodiment, first involves latter or stages that combination cumulative effect reduce incoming stream produced by, example, quantizer value easily manipulated by back-end therefore change factor K smaller, fixed integer 1 , regardless whether an number fractional number.