Fig. 6: Method used to stimulate memristors in tactile and visual experiments.
From: Memristor-based adaptive neuromorphic perception in unstructured environments
a Control schemes in tactile differential processing. The system initiates by entering the initialization phase, where it performs an initial power-on reset on the device. Afterward, the system proceeds to the normal working cycle. Within each working cycle, the system first employs a DAC and an ADC to detect the resistance value of the piezoresistive film. It then waits for the system analog switch to activate when read is completed. Subsequently, it detects the resistance value of the memristor through the memristor read and write control circuit. Once the status of both readings are complete, the DAC circuits generate the corresponding modulation voltage. This voltage is then used to modulate the resistance value of the memristor, achieving the differential processing of pressure information. b Circuit design of the visual differential process system. In this simulation, the external visual stimuli captured by the CMOS in-vehicle camera are utilized as the input signal for the system in the form of analog voltage signals. The visual information between two frames undergoes linear changes at a fixed time interval. Subsequently, the changes in visual information are extracted using filters. The extracted information is then translated into different modulation voltages through the analog operation circuit. Finally, the modulation voltage is applied to the memristor using the read and write control circuit. c Observed visual stimuli, intensity change extracted by the filter circuits and different modulation voltages applied to the memristor.
