Title :
Analysis and design of adaptive self-trimming technique for A/D converters
Author :
Gu, Zhlqlang ; Sneigrove, W.M.
Author_Institution :
Bell-Northern Res., Ottawa, Ont., Canada
fDate :
30 May-2 Jun 1994
Abstract :
A novel self-trimming algorithm for A/D converters has been presented which continually trims thresholds in the flash A/D subconverters of two-stage and pipelined A/D converters. Roughly speaking, it trims thresholds up or down by small increments in such a way as to smooth out irregularities in the code density. This paper presents the mathematical analysis and design of the algorithm. The algorithm was analyzed by a novel two-dimensional z-transform (Z-T), which can be used to demonstrate its stability, predict convergence rate, and which can be used to give a frequency-domain interpretation of the distinct properties of differential and integral nonlinearity
Keywords :
Z transforms; adaptive systems; analogue-digital conversion; calibration; frequency-domain analysis; numerical stability; A/D converters; adaptive self-trimming technique; algorithm design; convergence rate; differential nonlinearity; flash A/D subconverters; integral nonlinearity; mathematical analysis; pipelined ADC; stability; threshold trimming; two-dimensional z-transform; two-stage ADC; Algorithm design and analysis; Convergence; Degradation; Frequency; Histograms; Linearity; Mathematical analysis; Monitoring; Neodymium; Stability analysis;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409409