rail to rail cmos opamp

Constant-gm rail-to-rail CMOS op-amp input stage with overlapped transition regions
M Wang, TL Mayhugh Jr, SHK Embabi… – Solid-State Circuits,
Abstract Conventional techniques to achieve a constant-g m rail-to-rail complementary NP
differential input stage require complex additional circuitry. In addition, the frequency
response and common-mode rejection ratio (CMRR) are degraded. An economical but