Voltage Amplifier Based on Organic Electrochemical Transistor. Issue 1 (17th September 2016) - Braendlein, Marcel
Abstract : Organic electrochemical transistors (OECTs) are receiving a great deal of attention as amplifying transducers for electrophysiology. A key limitation of this type of transistors, however, lies in the fact that their output is a current, while most electrophysiology equipment requires a voltage input. A simple circuit is built and modeled that uses a drain resistor to produce a voltage output. It is shown that operating the OECT in the saturation regime provides increased sensitivity while maintaining a linear signal transduction. It is demonstrated that this circuit provides high quality recordings of the human heart using readily available electrophysiology equipment, paving the way for the use of OECTs in the clinic. Abstract : The working principle of a voltage amplifier based on an organic electrochemical transistor is demonstrated. By implementing a drain load resistor, a voltage to voltage transduction can be achieved with an amplification of up to 30 V/V, paving the way for a direct implementation in the clinic as an active organic electrode for electrophysiological activity.