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Design of bit-stream neuron based on direct Σ-Δ signal process

A novel method to build an artificial neuron is presented. All the modules in the artificial neuron are bit-stream units based on direct Σ-Δ signal process. The fundamental modules used in bit-stream artificial neuron, i.e., adder, multiplier, activation function unit, were implemented in integrated circuit (IC) form or Field Programmable Gate Array (FPGA). The principle, the structure and the performance of the modules are discussed.