Fig. 4
From: Design of low power energy efficient sigma-delta ADC for biomedical IoT applications

(a) Single-stage Folded-cascode Op-amp transistor level design biased using a Wide-Swing Cascode Current Mirror (WSCCM). (b) Two Stage Op amp Design.
From: Design of low power energy efficient sigma-delta ADC for biomedical IoT applications

(a) Single-stage Folded-cascode Op-amp transistor level design biased using a Wide-Swing Cascode Current Mirror (WSCCM). (b) Two Stage Op amp Design.