Design of low voltage OTA for bio-medical application

Abstract

This paper deals with the design of a low power signal conditioning circuit for use in biomedical applications. The signal conditioning circuit constitutes an opamp serving as a preamplifier and a low-pass filter for rejecting higher frequency components which are uncharacteristic of bio-medical applications. The Operational Transconductance Amplifier (OTA) design is done using UMC 180nm CMOS technology on the cadence virtuoso platform. The design is presented in terms of schematics and transistor dimensions. All relevant simulations is performed using spectre simulator at 1V power supply. The OT A's performance satisfies the required parameter for its implementation in biomedical portable devices. Corner analysis for gain and phase response have been performed at FF and SS corners for temperatures 100°C and 0°C respectively.