• Skip to main content
  • Skip to primary sidebar

Dharmendra S. Modha

My Work and Thoughts.

  • Brain-inspired Computing
    • Collaborations
    • Videos
  • Life & Universe
    • Creativity
    • Leadership
    • Interesting People
  • Accomplishments
    • Prizes
    • Papers
    • Positions
    • Presentations
    • Press
    • Profiles
  • About Me

Archives for May 2012

ASYNC 2012: A Digital Neurosynaptic Core Using Event-Driven QDI Circuits

May 10, 2012 By dmodha

Building on recently published cognitive computing chip technology, this week at ASYNC 2012: IEEE International Symposium on Asynchronous Circuits and Systems Cornell-IBM team published a new paper that won the Best Paper Award.  

TITLE: A Digital Neurosynaptic Core Using Event-Driven QDI Circuits

AUTHORS: Nabil Imam, Filipp Akopyan, John Arthur, Paul Merolla, Rajit Manohar, Dharmendra S Modha

ABSTRACT: We design and implement a key building block of a scalable neuromorphic architecture capable of running spiking neural networks in compact and low-power hardware. Our innovation is a configurable neurosynaptic core that combines 256 integrate-and-fire neurons, 1024 input axons, and 1024×256 synapses in 4.2mm2 of silicon using a 45nm SOI process. We are able to achieve ultra-low energy consumption 1) at the circuit-level by using an asynchronous design where circuits only switch while performing neural updates; 2) at the core-level by implementing a 256 neural fanout in a single operation using a crossbar memory; and 3) at the architecture level by restricting core-to-core communication to spike events, which occur relatively sparsely in time. Our implementation is purely digital, resulting in reliable and deterministic operation that achieves for the first time one-to-one correspondence with a software simulator. At 45pJ per spike, our core is readily scalable and provides a platform for implementing a wide array of real-time computations. As an example, we demonstrate a sound localization system using coincidence-detecting neurons.

Filed Under: Accomplishments, Brain-inspired Computing, Papers

Primary Sidebar

Recent Tweets

  • Fundamental Principle: Nature Abhors Gradients. https://t.co/KI2CRhWJdRover a year ago
  • The TrueNorth Journey https://t.co/XnpDScCAUV @IBMResearchover a year ago
  • Inspiration: "No great thing is created suddenly" - Epictetusover a year ago
  • IEEE Computer Cover Feature — TrueNorth: Accelerating From Zero to 64 Million Neurons in 10 Years @IBMResearch… https://t.co/4fvYk2JCPTover a year ago
  • "In 2012, computer scientist Dharmendra Modha used a powerful supercomputer to simulate the activity of more than 5… https://t.co/Sz17XsG5h5over a year ago
  • Management Tip: Team success is AND, not OR.over a year ago
  • The creation of the electronic brain https://t.co/wBKjGtqkvi via @issuu See page 39 onwards ... @IBMResearchover a year ago
  • Creativity Tip: Beeline to problem, spiral to solution.over a year ago
  • PREPRINT: Low Precision Policy Distillation with Application to Low-Power, Real-time Sensation-Cognition-Action Loo… https://t.co/WZHmGS5AxJover a year ago
  • "The power and performance of neuromorphic computing is far superior to any incremental solution we can expect on a… https://t.co/B2k9ZznHIJover a year ago

Recent Posts

  • Jobs in Brain-inspired Computing
  • Neuromorphic scaling advantages for energy-efficient random walk computations
  • Discovering Low-Precision Networks Close to Full-Precision Networks for Efficient Inference
  • Exciting Opportunities in Brain-inspired Computing at IBM Research
  • The TrueNorth Journey: 2008 – 2018 (video)

Archives by Month

  • 2022: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2020: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2019: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2018: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2017: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2016: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2015: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2014: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2013: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2012: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2011: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2010: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2009: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2008: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2007: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • 2006: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Evolution: Brain-inspired Computing

Copyright © 2023