Title :
Optimal switching sequences for one-dimensional linear gradient error compensation in unary DAC arrays
Author :
Cong, Yonghua ; Geiger, Randall L.
Author_Institution :
Iowa State Univ., Ames, IA, USA
Abstract :
Gradient error can be compensated by optimizing switching sequences of DAC arrays. This paper establishes an absolute lower bound of integral nonlinearity (INL) which may be achieved by optimizing switching sequences. Optimal switching sequences that meet this lower bound are presented for one-dimensional linear gradient error compensation in unary (thermometer decoded) DAC arrays. The sequences can be used in row-column decoded current or capacitor unary arrays as well as R-string DACs, where the switching sequence is optimized in one dimension
Keywords :
circuit optimisation; digital-analogue conversion; error compensation; R-string DACs; absolute lower bound; capacitor arrays; integral nonlinearity; one-dimensional linear gradient error compensation; optimal switching sequences; row-column decoded current arrays; thermometer decoded arrays; unary DAC arrays; Capacitors; Decoding; Doping; Error compensation; Linear approximation; Linearity; Power supplies; Switches; Symmetric matrices; Voltage;
Conference_Titel :
Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on
Conference_Location :
Lansing, MI
Print_ISBN :
0-7803-6475-9
DOI :
10.1109/MWSCAS.2000.951458
