International Business Machines Corporation

Thomas Bohnstingl

Evangelos Stavros Eleftheriou

Angeliki Pantazi

Stanislaw Andrzej Wozniak

The present disclosure relates to a neural network system comprising: a controller including a processing unit configured to execute a spiking neural network, and an interface connecting the controller to an external memory. The controller is configured for executing the spiking neural network, the executing comprising generating read instructions and/or write instructions. The interface is configured for: generating read weighting vectors according to the read instructions, coupling read signals, representing the read weighting vectors, into input lines of the memory, thereby retrieving data from the memory, generating write weighting vectors according to the write instructions, coupling write signals, representing the write weighting vectors, into output lines of the memory, thereby writing data into the memory.

Memory-augmented spiking neural network system

Neuromorphic methods, systems and devices are provided. The embodiment may include a neuromorphic device which may comprise a crossbar array structure and an analog circuit. The crossbar array structure may include N input lines and M output lines interconnected at junctions via N&#xd7;M electronic devices, which, in preferred embodiments, include, each, a memristive device. The input lines may comprise Nfirst input lines and Nsecond input lines. The first input lines may be connected to the M output lines via N&#xd7;M first devices of said electronic devices. Similarly, the second input lines may be connected to the M output lines via N&#xd7;M second devices of said electronic devices. The analog circuit may be configured to program the electronic devices so as for the first devices to store synaptic weights and the second devices to store neuronal states.

Neuromorphic device with crossbar array structure storing both weights and neuronal states of neural networks

In a hardware-implemented approach for operating a neural network system, a neural network system is provided comprising a controller, a memory, and an interface connecting the controller to the memory, where the controller comprises a processing unit configured to execute a neural network and the memory comprises a neuromorphic memory device with a crossbar array structure that includes input lines and output lines interconnected at junctions via electronic devices. The electronic devices of the neuromorphic memory device are programmed to incrementally change states by coupling write signals into the input lines based on: write instructions received from the controller and write vectors generated by the interface. Data is retrieved from the neuromorphic memory device, according to a multiply-accumulate operation, by coupling read signals into one or more of the input lines of the neuromorphic memory device based on: read instructions from the controller and read vectors generated by the interface.

Crossbar arrays for computations in memory-augmented neural networks

The present disclosure relates to a storage device comprising a memory element. The memory element may comprise a changeable physical quantity for storing information. The physical quantity may be in a drifted state. The memory element may be configured for setting the physical quantity to an initial state. Furthermore, the memory element may comprise a drift of the physical quantity from the initial state to the drifted state. The initial state of the physical quantity may be computable by means of an initialization function. The initialization function may be dependent on a target state of the physical quantity and the target state of the physical quantity may be approximately equal to the drifted state of the physical quantity.

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Thalwil, Switzerland

Thomas Bohnstingl