A 0.6 V Bulk-Driven Class-AB Two-Stage OTA with Non-Tailed Differential Pair

This work presents a two-stage operational transconductance amplifier suitable for sub-1 V operation. characteristic is achieved thanks to the adoption of bulk-driven non-tailed differential pair. Local positive feedback exploited boost equivalent first stage and quasi-floating gate approach enables class AB operation second stage. Implemented in standard 180 nm CMOS technology supplied at 0.6 V, exhibits 350 kHz gain bandwidth product phase margin 69° while driving 150 pF load. Compared other solutions literature, proposed one considerable performance improvement, especially large signal