Extended Data Fig. 3: Output response analysis of the RNPU circuit to a staircase input.
From: Analogue speech recognition based on physical computing
The RNPU circuit shown in Fig. 2 and Fig. 3 of the manuscript is fed with a staircase-like input signal (orange) and the output (blue) is measured and normalized to one. In contrast to a linear time-invariant (LTI) RC circuit, the resistance of the RNPU is a nonlinear function of the input as well as the charge stored on the external capacitance. The time constant of each step is calculated by fitting an exponential to the output in software.
