Energy-Efficient Time-Domain Vector-by-Matrix Multiplier for Neurocomputing and Beyond

Energy-Efficient Time-Domain Vector-by-Matrix Multiplier for Neurocomputing and Beyond

We propose an extremely energy-ecient mixed-signal approach for performing vector-by-matrix multiplication in a time domain. In such implementation, multi-bit values of the input and output vector elements are represented with time-encoded digital signals, while multi-bit matrix weights are realized with current sources, e.g. transistors biased in subthreshold regime. With our approach, multip...

Time and Energy Efficient Matrix Factorization Using FPGAs

In this paper, new algorithms and architectures for matrix factorization are presented. Two fully-parallel and block-based designs for LU decomposition on configurable devices are proposed. A linear array architecture is employed to minimize the usage of long interconnects, leading to lower energy dissipation. The designs are made scalable by using a fixed I/O bandwidth independent of the probl...

An efficient finite difference time domain algorithm for band structure calculations of Phononic crystal

In this paper, a new algorithm for studying elastic wave propagation in the phononic crystals is presented. At first, the displacement-based forms of elastic wave equations are derived and then the forms are discretized using finite difference method. So the new algorithm is called the displacement-based finite difference time domain (DBFDTD). Three numerical examples are computed with this met...

An Energy-Efficient VCO-Based Matrix Multiplier Block to Support On-Chip Image Analysis

Images typically are represented as uniformly sampled data in the form of matrix of pixels/voxels. Therefore, matrix multiply-and-accumulate (MAC) forms the core of most state-ofthe-art image analysis algorithms. While digital implementation of MAC has generally been the preferred approach, high power consumption is an impediment to adopting it for medical image analysis. In this work, we prese...

Programmable real-time incoherent matrix multiplier for optical processing.