A chopper amplifier with adaptive biasing OTA for biomedical applications, featuring high gain and CMRR.

ABSTRACT: This paper presents a design of fully differential chopper amplifier employing the flipped voltage follower (FVF) adaptive biasing technique, focusing on its potential use in biopotential recording applications. The suggested architectural OTA incorporates self-cascoded current mirrors (SCCMs) as the active load to achieve a substantial output swing. The FVFs based adaptive biasing approach for the differential input stage boosts extra current and enhances gain and dynamic characteristics. The chopper amplifier attains a common mode rejection ratio (CMRR) of more than 100 dB through the strategic utilization of chopper modulators and pseudo-resistors. Additionally, this device exhibits characteristics such as accurate and stable gain, high input impedance, and a compact physical footprint.

SUBMITTER: Kasipogula BR 

PROVIDER: S-EPMC11559999 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature