Neuromorphic object localization using resistive memories and ultrasonic transducers

Abstract

Real-world sensory-processing applications require compact, low-latency, and low-power computing systems. Enabled by their in-memory event-driven computing abilities, hybrid memristive-CMOS neuromorphic architectures provide an ideal hardware substrate for such tasks. To demonstrate the full potential of such systems, we propose and experimentally demonstrate an end-to-end sensory processing solution for a real-world object localization application. Drawing inspiration from the barn owl’s neuroanatomy, we developed a bio-mimetic, event-driven object localization system that couples state-of-the-art piezoelectric micromachined ultrasound transducer (pMUT) sensors to a neuromorphic resistive memories-based computational map. We present measurement results from the fabricated system comprising resistive memories-based coincidence detectors, delay line circuits, and a full-custom pMUT sensor. We use these experimental results to calibrate our system-level simulations. These simulations are then used to estimate the angular resolution and energy efficiency of the object localization model. The results reveal the potential of our approach, evaluated in orders of magnitude greater energy efficiency than a microcontroller performing the same task.

Research progress in architecture and application of RRAM with computing-in-memory

“…The devices were tested with pulses to simulate sound signals, showing that the training accuracy and energy consumption of the system built using the memristor array were signicantly improved, representing a signicant advance in auditory localization systems with memristors. F. Moro et al 64 designed an event-driven object localization system inspired by the owl auditory cortex using a combination of stateof-the-art piezoelectric micromechanical ultrasound sensors and RRAM. The system was more efficient and power-efficient than microcontrollers performing the same task by several orders of magnitude.…”