Title :
1-D and 2-D switching strategies achieving near optimal INL for thermometer-coded current steering DACs
Author :
Yu, Zhongiun ; Chen, Degang ; Geiger, Randy
Author_Institution :
Iowa State Univ., Ames, IA, USA
Abstract :
It is known that thermometer coded current steering DACs have very small DNLs but much larger INLs, even with the best switching strategies available in the literature. In this paper, we present algorithms for generating near optimal 1-D switching strategies for any types of gradient errors and 2-D switching strategies for linear gradient errors. In both cases, the new switching strategies result in total INL that is less than the DNL. This is far less than what was achievable by existing switching strategies and is very close to the absolute lower limit of 1/2 DNL.
Keywords :
digital-analogue conversion; 1D switching; 2D switching; DNL; INL; gradient error; linear gradient error; thermometer-coded current steering DAC; Current measurement; Decoding; Doping; Frequency; Linear approximation; Resistors; Stress; Switching circuits; Temperature; Voltage;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205712
