Download e-book for iPad: Event-Based Neuromorphic Systems by Shih-Chii Liu, Tobi Delbruck, Giacomo Indiveri, Adrian

By Shih-Chii Liu, Tobi Delbruck, Giacomo Indiveri, Adrian Whatley, Rodney Douglas

ISBN-10: 0470018496

ISBN-13: 9780470018491

Neuromorphic digital engineering takes its notion from the functioning of frightened platforms to construct extra strength effective digital sensors and processors. Event-based neuromorphic platforms are encouraged by way of the brain's effective data-driven communique layout, that is key to its quickly responses and memorable capabilities.  This cross-disciplinary textual content establishes how circuit development blocks are mixed in architectures to build whole platforms. those comprise imaginative and prescient and auditory sensors in addition to neuronal processing and studying circuits that enforce types of anxious systems.

Techniques for construction multi-chip scalable structures are thought of in the course of the ebook, together with tools for facing transistor mismatch, broad discussions of verbal exchange and interfacing, and making structures that function within the actual global. The e-book additionally presents old context that is helping relate the architectures and circuits to one another and that courses readers to the large literature. Chapters are written through founding specialists and feature been broadly edited for total coherence.

This pioneering textual content is an integral source for training neuromorphic digital engineers, complex electric engineering and computing device technological know-how scholars and researchers attracted to neuromorphic systems.

Key features:

  • Summarises the newest layout methods, functions, and destiny demanding situations within the box of neuromorphic engineering.
  • Presents examples of useful functions of neuromorphic layout principles.
  • Covers address-event verbal exchange, retinas, cochleas, locomotion, studying conception, neurons, synapses, floating gate circuits, and software program infrastructure, algorithms, and destiny challenges.

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Additional resources for Event-Based Neuromorphic Systems

Sample text

Action potentials, or so-called spikes from the shapes of their waveforms, whether traveling along axons in white matter or unmyelinated axons in gray matter are stereotypical (Gerstner and Kistler 2002). Although their amplitudes, durations (around 1 ms), and precise shapes can vary somewhat, they can be treated as all-or-none, essentially digital events. Neuromorphic electronic systems must embed complex networks of neurons, axons, and synapses, which nature builds in three dimensions (3D), into an essentially 2D silicon substrate.

Reprinted, with permission, from Boahen (2000). 1 Time-multiplexed communication channel design options. © 2000 IEEE. Reprinted, with permission, from Boahen (2000) Feature Approaches Remarks Latency Polling Event driven ∝ Number of neurons ∝ Active fraction Integrity Rejection Arbitration Collisions increase exponentially Queue events Dispersion Dumping Queuing No waiting ∝−1 surplus capacity Capacity Hardwired Pipelined Simple ⇒ Short cycle time ∝−1 slowest stage optimized if collisions are prevented through arbitration; it is then limited only by the increase in latency with activity due to queuing (Boahen 2000; Deiss et al.

As N???? = aN, the error is 400∕N if the active fraction, a, is 5%. Therefore, the arbitered channel can operate close to capacity with timing errors of a few % when the population size exceeds several tens of thousands. 4 Predicting Throughput Requirements Given a neuron’s firing rate immediately after a step change in its input, fa , we can calculate the peak spike rate of active neurons and add the firing rate of passive neurons to obtain the maximum spike rate. Active neurons fire at a peak rate of ????fa , where ???? is the synchronicity.

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Event-Based Neuromorphic Systems by Shih-Chii Liu, Tobi Delbruck, Giacomo Indiveri, Adrian Whatley, Rodney Douglas

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