ACTIVE LOGIC ELEMENTS USING NON-GALVANIC MODIFYING INPUTS.
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1964
- Accession Number
- AD0610395
Entities
People
- G. Herzog
- K. C. Hu
- M. H. Lewin
Organizations
- RCA Corporation