Akihiro Hirosaki Masatomo Miura Atsushi Matsumoto Takahiro Hanyu Vth-Variation Compensation of Multiple-Valued Current-Mode Circuit Using TMR Devices. 14-19 2008 ISMVL http://doi.ieeecomputersociety.org/10.1109/ISMVL.2008.13 conf/ismvl/2008 db/conf/ismvl/ismvl2008.html#HirosakiMMH08