Computation module for addition and multiplication in residue ar

Details Computation module for addition and multiplication in residue ar Computation module for addition and multiplication in residue ar

1980-08-13

1982-12-07

Malzahn, David H.

Boots, shoes, and leggings

364713, G06F 772

Patent

active

043631061

ABSTRACT:
A computation module useful as part of a optical numerical computer based on the residue number system includes an M.times.N array of double input, double output electrically actuated optical switches. Optical pathways interconnect each of the outputs of the switches of a row of the array and certain inputs of the switches in the subsequent adjacent row. Each row of the array has an associated bi-stable electrical switch which is interconnected to all of the light switches in that row and causes such light switches to assume a common state dependent upon the state of the electrical switch. The module computes either the sum or product of two modulo M residues, depending upon its interconnection pattern. One of the residues is introduced as a light input to one of the electrical optical switches in the first row of the array. The other residue is operative to condition one of the bi-stable electrical switches to assume a different state than all of the other electrical switches. The output from the module is in the form of a light signal from one of the electro-optical switches in the last row of the array.

REFERENCES:
patent: 3996455 (1976-12-01), Schaefer et al.
patent: 4107783 (1978-08-01), Huang
Psaltis & Casasent "Optical Residue Arithmetic: a Correlation Approach" Applied Optics vol. 18, No. 2, Jan. 15, 1979, pp. 163-171.

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