Tunable Low Voltage Low Power Operational Transconductance Amplifier For Biomedical Application

The operational transconductance amplifier (OTA) is a mostly used analog processing block. In recent years, the development of OTA with very low conductivity, low power, low voltage, improved linearity has been mainly used in biomedical applications. This paper presents a tunable operational transconductance amplifier using CMOS technology which frequency is tunable by varying the control voltage. By tuning the frequency of the OTA, the OTA is used for various biomedical applications Such as ECG, EEG, and ERG applications with respectively frequency 250Hz, 200Hz and 100Hz. The design of the proposed OTA has done in 90nm CMOS environment with a supply voltage of ±0.35V.