Abstract
A new solution for a fully differential bulk-driven Operational Transconductance Amplifier (OTA) for ultra-low-voltage applications is proposed herein. The amplifier eliminates the tail current source, performs a common-mode control and a transconductance adjust in parallel. All transistors in the project are biased in the weak inversion region. The minimum supply voltage is 150 mV using a transistor stack up of two. Simulations indicate that the Common Mode Rejection Ratio (CMRR), transconductance and Total Harmonic Distortion (THD) are compatible with biomedical applications.
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