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ACTIVE LOGIC ELEMENTS USING NON-GALVANIC MODIFYING INPUTS.
RCA LABS PRINCETON N J
Large arrays of batch-fabricated active elements present a problem of interconnections. A general interconnection scheme which can be modified at the convenience of the user is sought. An array of 128 insulated-gate fieldeffect transistors IGFET of the metal-oxide-semiconductor MOS type was assembled together with photosensitive control of signal paths. Sixty-four of the MOS transistors act as NOR logic gates with the remaining 64 MOS transistors acting as ON-OFF switches in series with the signal path. These latter MOS transistors are controlled by photosensitive elements stimulated by a light pattern. The light pattern is generated by holes in a data-processing punched card. The photosensitive elements in the present array are cadmium sulfide photoconductors fabricated on ceramic plates, but extensive work was done on cadmium telluride high-voltage photovoltaic films intended for use directly on the substrate of the active logic elements. The test array fabricated demonstrates how the signal path of a computer might be controlled by a punched card prepared either by its own output or the output of other computers. Author
Final rept. for 1 Jul 62-30 Sep 64,
AF19 628 1629