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Journal ArticleDOI

Distributed In-Memory Computing on Binary RRAM Crossbar

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TLDR
Based on numerical results for fingerprint matching that is mapped on the proposed RRAM-crossbar, the proposed architecture has shown 2.86x faster speed, 154x better energy efficiency, and 100x smaller area when compared to the same design by CMOS-based ASIC.
Abstract
The recently emerging resistive random-access memory (RRAM) can provide nonvolatile memory storage but also intrinsic computing for matrix-vector multiplication, which is ideal for the low-power and high-throughput data analytics accelerator performed in memory. However, the existing RRAM crossbar--based computing is mainly assumed as a multilevel analog computing, whose result is sensitive to process nonuniformity as well as additional overhead from AD-conversion and I/O. In this article, we explore the matrix-vector multiplication accelerator on a binary RRAM crossbar with adaptive 1-bit-comparator--based parallel conversion. Moreover, a distributed in-memory computing architecture is also developed with the according control protocol. Both memory array and logic accelerator are implemented on the binary RRAM crossbar, where the logic-memory pair can be distributed with the control bus protocol. Experimental results have shown that compared to the analog RRAM crossbar, the proposed binary RRAM crossbar can achieve significant area savings with better calculation accuracy. Moreover, significant speedup can be achieved for matrix-vector multiplication in neural network--based machine learning such that the overall training and testing time can be both reduced. In addition, large energy savings can be also achieved when compared to the traditional CMOS-based out-of-memory computing architecture.

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Citations
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Journal ArticleDOI

A 64-Tile 2.4-Mb In-Memory-Computing CNN Accelerator Employing Charge-Domain Compute

TL;DR: This paper addresses data movement via an in-memory-computing accelerator that employs charged-domain mixed-signal operation for enhancing compute SNR and, thus, scalability in large-scale matrix-vector multiplications.
Journal ArticleDOI

In-memory Learning with Analog Resistive Switching Memory: A Review and Perspective

TL;DR: This article defines the main figures of merit (FoMs) of analog RSM hardware including the basic device characteristics, hardware algorithms, and the corresponding mapping methods for device arrays, as well as the architecture and circuit design considerations for neural networks.
Journal ArticleDOI

Analog architectures for neural network acceleration based on non-volatile memory

TL;DR: This work explores and consolidates the various approaches that have been proposed to address the critical challenges faced by analog accelerators, for both neural network inference and training, and highlights the key design trade-offs underlying these techniques.
Journal ArticleDOI

Neuromorphic Spiking Neural Networks and Their Memristor-CMOS Hardware Implementations

TL;DR: In this paper, hybrid memristor-CMOS approaches have been proposed to implement large-scale neural networks with learning capabilities, offering a scalable and lower-cost alternative to existing CMOS systems.
References
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Journal ArticleDOI

Resistive Random Access Memory (ReRAM) Based on Metal Oxides

TL;DR: In this paper, the authors review the recent progress in the resistive random access memory (ReRAM) technology, one of the most promising emerging nonvolatile memories, in which both electronic and electrochemical effects play important roles in the non-volatile functionalities.

Resistive Random Access Memory (ReRAM) Based on Metal Oxides This paper reviews a class of metal-oxide-metal resistive memory structures that depend on a chemical oxidation/reduction process to cause a change in resistance when a voltage pulse is applied.

TL;DR: The challenges facing the ReRAM technology as it moves toward the beyond-2X-nm generation of nonvolatile memories and the so-called beyond complementary metal-oxide-semiconductor (CMOS) device are summarized.
Journal ArticleDOI

How We Found The Missing Memristor

TL;DR: A memristor is a two-terminal memory resistor whose resistance depends on the voltage applied to it and the length of time that voltage has been applied as discussed by the authors, i.e., when the voltage is turned off, the memory resistor remembers its most recent resistance until the next time it is turned on.
Proceedings ArticleDOI

Low power and high speed bipolar switching with a thin reactive Ti buffer layer in robust HfO2 based RRAM

TL;DR: In this paper, a novel HfO2-based resistive memory with the TiN electrodes is proposed and fully integrated with 0.18 mum CMOS technology, which uses a thin Ti layer as the reactive buffer layer into the anodic side of capacitor-like memory cell, and excellent memory performances such as low operation current (down to 25 muA), high on/off resistance ratio (above 1,000), fast switching speed (5 ns), satisfactory switching endurance (>106 cycles) have been demonstrated in the memory device.
Journal ArticleDOI

Machine learning for real-time single-trial EEG-analysis: from brain-computer interfacing to mental state monitoring.

TL;DR: An outline of the Berlin brain-computer interface (BBCI) is given, which can be operated with minimal subject training, and spelling with the novel BBCI-based Hex-o-Spell text entry system, which gains communication speeds of 6-8 letters per minute.
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