Compact cognitive synaptic computing circuits with crossbar arrays spatially in a staggered pattern
AssigneeInternational Business Machines Corporation
InventorDharmendra S. Modha
Life of this patent
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Abstract
Embodiments of the invention relate to producing spike-timing dependent plasticity using electronic neurons interconnected in a crossbar array network. The crossbar array network comprises a plurality of crossbar arrays. Each crossbar array comprises a plurality of axons and a plurality of dendrites such that the axons and dendrites are transverse to one another, and multiple synapse devices, wherein each synapse device is at a cross-point junction of the crossbar array coupled between a dendrite and an axon. The crossbar arrays are spatially in a staggered pattern providing a staggered crossbar layout of the synapse devices.
Claims27
A neuromorphic and synaptronic system, comprising:
- a plurality of electronic neurons;
- and
- a crossbar array network configured for interconnecting the plurality of electronic neurons, the crossbar array network comprising:
- a plurality of crossbar arrays, each crossbar array comprising:
- a plurality of axons and a plurality of dendrites such that the axons and dendrites are transverse to one another;
- and
- multiple synapse devices, wherein each synapse device is at a cross-point junction of the crossbar array coupled between a dendrite and an axon;
- wherein the crossbar arrays are spatially in a staggered pattern providing a staggered crossbar layout of the synapse devices.
A method, comprising:
- when an electronic neuron spikes, sending a spiking signal from the electronic neuron to each axon and each dendrite connected to a spiking electronic neuron in a network of electronic neurons, producing spike-timing dependent plasticity (STDP);
- wherein the network of electronic neurons comprises:
- a plurality of electronic neurons;
- and
- a crossbar array network configured for interconnecting the plurality of electronic neurons, the crossbar array network comprising:
- a plurality of crossbar arrays, each crossbar array comprising:
- a plurality of axons and a plurality of dendrites such that the axons and dendrites are transverse to one another;
- and
- multiple synapse devices, wherein each synapse device is at a cross-point junction of the crossbar array coupled between a dendrite and an axon;
- wherein the crossbar arrays are spatially in a staggered pattern providing a staggered crossbar layout of the synapse devices.
A neuromorphic and synaptronic system, comprising:
- a plurality of electronic neurons;
- a crossbar array network configured for interconnecting the plurality of electronic neurons, the crossbar array network comprising:
- a plurality of crossbar arrays, each crossbar array comprising:
- a plurality of axons and a plurality of dendrites such that the axons and dendrites are transverse to one another;
- and
- multiple synapse devices, wherein each synapse device is at a cross-point junction of the crossbar array coupled between a dendrite and an axon;
- wherein the crossbar arrays are spatially in a staggered pattern providing a staggered crossbar layout of the synapse devices in a two dimensional plane, such that the multiple synapse devices of each crossbar array are offset relative to the multiple synapse devices of a neighboring crossbar array;
- wherein each of the plurality of electronic neurons corresponds to one of the plurality of the crossbar arrays;
- and
- a signal generator for clocking activation of multiple crossbar arrays in the network at the same time.
Dependencies are inferred from the claim text.