Extended Data Fig. 1: Voltage-in current-out (static) characterization of a boron-doped RNPU.
From: Analogue speech recognition based on physical computing
a, Transimpedance (voltage-to-current) amplifier circuit to characterize the device. b, Output current of each electrode (ei) in response to a voltage sweep input from −400 mV to 400 mV, while other electrodes are at zero volt. c, (left panel) The input electrode (e4) receives an input sweep with 400 mV magnitude (shown in red) while the rest of the electrodes are at a constant voltage after an upward ramp from 0 V. (right panel) Output current of the RNPU demonstrating negative differential resistance.
