Title :
A versatile, efficient digital filter for decimation and interpolation
Author :
Brandt, B.P. ; Wooley, B.A.
Author_Institution :
Texas Instrum. Inc., Dallas, TX, USA
Abstract :
The area and power consumption of oversampled data converters are governed largely by the associated digital decimation and interpolation filters. This paper presents an area- and power-efficient programmable digital filter for decimation and interpolation in digital-audio applications. Several architectural and implementation features reduce the complexity of the filter and allow its implementation in a die area of only 3670 mils/sup 2/ (2.37 mm/sup 2/). The filter is first described in the context of decimation for an oversampled A/D converter employing a second-order sigma-delta modulator. Extensions of the filter to accommodate other modulators, as well as to perform interpolation for oversampled D/A conversion, are then discussed.
Keywords :
CMOS integrated circuits; VLSI; analogue-digital conversion; convertors; delta modulation; digital filters; encoding; random-access storage; area; area-efficient programmable digital filter; decimation; die area; digital decimation; digital-audio applications; interpolation; interpolation filters; oversampled A/D converter; oversampled D/A conversion; oversampled data converters; power consumption; power-efficient programmable digital filter; second-order sigma-delta modulator; versatile efficient digital filter; CMOS integrated circuits, memory; Coding/decoding; Converters; FIR digital filters; Random-access memories; Sigma-delta modulation; Very-large-scale integration;
Conference_Titel :
VLSI Circuits, 1993. Digest of Technical Papers. 1993 Symposium on
Conference_Location :
Kyoto, Japan
DOI :
10.1109/VLSIC.1993.920546
