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Analog Integrated Circuits and Signal Processing

, Volume 89, Issue 3, pp 619–629 | Cite as

Implementing delay insensitive oscillatory neural networks using CMOS and emerging technology

  • Thomas C. JacksonEmail author
  • Rongye Shi
  • Abhishek A. Sharma
  • James A. Bain
  • Jeffrey A. Weldon
  • Lawrence Pileggi
Article
  • 358 Downloads

Abstract

One major challenge in efficiently implementing neuromorphic networks is the need for a large number of variable synaptic connections. Networks that use emerging resistive memories as synapses have been proposed to tackle this problem, but interfacing with these devices is still inefficient in deeply-scaled CMOS. Oscillatory Neural Networks (ONNs) use a different paradigm than most analog hardware implementations, and may be able to interface more efficiently with RRAM neurons. Previous work on ONNs, however, has not considered the effects of actual hardware implementation realities, such as delay in the network. In this work, the first reported IC implementation of an oscillatory neural network is designed and fabricated. Modifications are made to the ONN architecture based on theoretical analysis to allow for proper operation in real-world conditions. One modification is changing the PLL-type, giving the system a different dynamic trajectory which is robust to global delays. Additionally, circuitry is added to control the transport delay of the neuron output signals. A chip with the modified ONN architecture is designed and tested in 28 nm CMOS and estimated power and area figures are reported.

Keywords

Neuromorphic computing Oscillatory neural network RRAM crossbar synapses 

Notes

Acknowledgments

Thanks to George Bocchetti and Lily Zhang for assistance in the design and simulation of various PLL components.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Thomas C. Jackson
    • 1
    Email author
  • Rongye Shi
    • 1
  • Abhishek A. Sharma
    • 1
  • James A. Bain
    • 1
  • Jeffrey A. Weldon
    • 1
  • Lawrence Pileggi
    • 1
  1. 1. Carnegie Mellon University PittsburghUSA

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