Wave digital decimation filters in oversampled A/D converters

A digital decimation filter system for oversampled A/D (analog-to-digital) converters is addressed. To achieve very low passband ripples for data acquisition converters, a cascade of a comb filter and some bireciprocal equiripple wave digital decimation filters is applied. The complexity of the filters is minimized by taking into account the noise shaping of the modulator. An example is considered, involving the design of a digital decimation filter for a 16-bit sigma-delta A/D converter.<<ETX>>

[1]  E. Dijkstra,et al.  A CAD tool for oversampled CMOS A/D converters , 1987, 1987 Symposium on VLSI Circuits.

[2]  Walter Ulbrich,et al.  Adder-based digital signal processor architecture for 80 NS cycle time , 1984, ICASSP.

[3]  James C. Candy,et al.  Decimation for Sigma Delta Modulation , 1986, IEEE Trans. Commun..

[4]  Lajos Gazsi,et al.  Explicit formulas for lattice wave digital filters , 1985 .

[5]  C. Piguet,et al.  On the use of modulo arithmetic comb filters in sigma delta modulators , 1988, ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing.

[6]  M. W. Hauser,et al.  MOS ADC-filter combination that does not require precision analog components , 1985, 1985 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.