ACTIVE LOGIC ELEMENTS USING NON-GALVANIC MODIFYING INPUTS.
Final rept. 1 Oct 64-30 Sep 65,
RCA LABS PRINCETON N J
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A logic array of 128 MOS transistors was constructed that has the ability to operate as a half-adder, a ring oscillator with any odd number of stages up to 15, a group of coupled flip-flops or any one of many other special configurations. The desired logic network is specified by an optical radiation pattern determined by the holes punched in a standard business data card. Photoconductors sense the radiation and turn on MOS transistors that close the signal paths between MOS transistor-NOR gates. The logic performed therefore depends on which paths are closed between the various NOR gates. Insulated-gate field-effect transistors IGFET of the metal-oxide-semiconductor MOS variety were selected for this use because of the small amount of energy required to control their conduction. Experiments with thin-film versions of the IGFET indicate equivalent usefulness and the promise of large low-cost modifiable arrays of logic gates. Author
- Electrical and Electronic Equipment
- Computer Hardware