Title :
Improved dynamic linearity in multi-level Σ-Δ converters by spectral dispersion of D/A distortion products
Author :
Redman-White, W. ; Bourner, D.J.L.
Author_Institution :
Southampton Univ., UK
Abstract :
A hardware efficient scheme for realising multi-level Σ-Δ converters with high static and dynamic linearity has been presented. Distortion products due to D/A nonlinearity are dispersed by pseudorandom error assignment, and can be shifted away from the signal baseband so that forward path quantisation noise shaping is not compromised. The spectral dispersion technique is well suited to monolithic implementation in either MOS or bipolar circuitry, with no requirement for trimming
Keywords :
analogue-digital conversion; coding errors; interference suppression; monolithic integrated circuits; A/D convertor; ADC; D/A distortion products; D/A nonlinearity; MOS; bipolar circuitry; dynamic linearity; forward path quantisation noise shaping; hardware efficient scheme; monolithic implementation; multilevel delta-sigma convertor; pseudorandom error assignment; spectral dispersion;
Conference_Titel :
Circuit Theory and Design, 1989., European Conference on
Conference_Location :
Brighton
