Abstract
Robust neural recording systems require efficient amplification of weak neural signals at very first stage using Operational Trans-conductance Amplifier (OTA) which should consume minimum power, noise and area. However, there exist a tradeoff for improving the power, noise and area simultaneously. Open loop configuration of OTA has inherent property of lesser area due to absence of feedback; it also provides better noise performance under the given power budget as compared to closed loop counterparts. This paper focuses on the design of Open-loop amplifier OTA topology for non-invasive EEG signals. The simulation results show the improvement in the gain performance of the circuit at 180nm technology node while power and noise of the circuit remains comparable with the existing circuits.
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