Resistors layout for enhancing yield of R-2R DACs

Yu Lin, R. Geiger
2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353)  
A new strategy for allocating area, at layout, for enhancing the soft yield of R-2R ladders is introduced. In contrast to the conventional and convenient approach of allocating equal area to each R/2R bit-slice, the new strategy allocates progressively larger areas to higher-order bits. With this strategy, the INL yield for a fixed total resistor area as determined by local random variations in the sheet resistance is optimized. Simulation results show that the new area allocation strategy
more » ... des significant improvements in INL yield compared to what is achievable with the conventional area allocation strategy.
doi:10.1109/iscas.2002.1010649 dblp:conf/iscas/LinG02 fatcat:w25jpy6cb5dupch6e3f7kjooka