Current-mode based analog circuits for synthetic neural systems

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307494, 395 21, G06G 712

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active

052065413

ABSTRACT:
A two transistor current-controlled current conveyor (C4) circuit is provided which exploits the translinear properties of the MOS transistor in subthreshold and uses unidirectional current signals. As a result, the circuits of the invention achieve high functionality and integration density with very low power dissipation. Two C4 circuits connected to and communicating through a bidirectional junction circuit of the invention permit the transmission of independent, bidirectional signals. These circuits are useful for implementing synthetic neural systems such as associative memories and silicon retinas, such as winner-takes-all and pyramidal neuron circuits and the outer-plexiform layer of a retina.

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Andreou, A. G., et al, "Current-Mode Subthreshold MOS Circuits for Analog VLSI Neural Systems", Mar. 1991, IEEE Trans. Neural Networks.
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Andreou, A. G., et al, "Synthetic Neural Circuits Using Current-Domain Signal Representations", 1989, Neural Computation.

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