Extremely simple constant-gm technique for low voltage rail-to-rail amplifier input stage. - Boram Lee; Ted Higman (ICECS, 2011)

1.2V constant-gm rail-to-rail CMOS Op-Amp input stage with new overlapped transition regions technique for ECG amplifier. - Boram Lee; Ted Higman (EMBC, 2013)

1V rail-to-rail constant Gm amplifier with common-mode elimination technique. - Boram Lee; Ted Higman (ISCAS, 2013)