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• W3004123481 abstract "Learning plays an important role in the brain to make it adaptive to dynamical environments. This paper presents a presynaptic spike-driven spike timing-dependent plasticity (STDP) learning rule in the address domain for a neuromorphic architecture using a synaptic connectivity table in an external memory at a local routing node. We contribute two aspects to the implementation of the learning rule for extended large-scale neuromorphic systems. First, we reduced buffer sizes required for tracing a spike train which is required to pair all presynaptic and postsynaptic spike for an STDP time window. This method implements an exponential decay STDP function with two parameters: the latest timestamp and the synaptic modification rate at the latest timestamp. It reduces the required buffer size compared to previous works. Second, we resolve a lack of reverse lookup table issue with the presynaptic spike-driven algorithm. The proposed algorithm holds causal updates at postsynaptic spikes until a next presynaptic spike arrival. This approach removes the need of a reverse lookup table required at a postsynaptic spike. We show the implementation of the proposed algorithm in an FPGA device and validate it with a spiking neural network configuration. The experiment results show the proposed algorithm is comparable qualitatively with a conventional STDP learning rule." @default.
• W3004123481 created "2020-02-07" @default.
• W3004123481 creator A5013472021 @default.
• W3004123481 creator A5064941086 @default.
• W3004123481 date "2020-06-01" @default.
• W3004123481 modified "2023-10-17" @default.
• W3004123481 title "Presynaptic Spike-Driven Spike Timing-Dependent Plasticity With Address Event Representation for Large-Scale Neuromorphic Systems" @default.
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• W3004123481 doi "https://doi.org/10.1109/tcsi.2020.2966884" @default.
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