Transistor arithmetic circuits for an interleaved-digit computer

Abstract

Earlier papers have described transistor circuits for use as computer elements. This paper describes the development of these, and various gating circuits, as the standard elements from which a digital computer has been constructed. The application of the standard circuits to the arithmetic unit of the computer is illustrated by two examples: an adder of unusual logical design to suit the interleaved-word storage system, and a multiplier system which forms the signed product of two 31-digit binary words in six word-times. A general description of the computer, and details of the magnetic-drum store, are given in accompanying papers.sistors. Mono-stable transistor circuits provide the pulses required to drive the bi-stable circuits from the "on" to the "off" condition.