Neural network with dynamic refresh capability

Details Neural network with dynamic refresh capability Neural network with dynamic refresh capability

1987-12-23

1989-09-12

Smith, Jerry

Boots, shoes, and leggings

364131, 307201, G06F 1546

Patent

active

048666459

ABSTRACT:
An analog neural network composed of an array of capacitors for storing weighted electric charges. Electric charges, or voltages, on the capacitors control the impedance (resistance) values of a corresponding plurality of MOSFETs which selectively couple input signals to one input of a summing amplifier. A plurality of semiconductor gating elements (e.g. MOSFETs) selectively couple to the capacitor's weighted analog voltage values received serially over an input line. The weighted voltage on the input line are periodically applied to the proper capacitors in the neural network via the gating elements so as to refresh the weighted electric charges on the capacitors, and at a multiplex rate that maintains the voltages on the capacitors within acceptable tolerance levels.

REFERENCES:
patent: 4660166 (1987-04-01), Hopfield
patent: 4731747 (1988-03-01), Denker
patent: 4737929 (1988-04-01), Denker
patent: 4752906 (1988-06-01), Kleinfeld
patent: 4755963 (1988-07-01), Denker
patent: 4760437 (1988-07-01), Denker et al.
Y. Tsividis & S. Satyanarayana, "Analogue Circuits for Variable-Synapse Electronic Neural Networks", Electronics Letters, Nov. 19, 1987, pp. 1313-1314.

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