Principles of d.c. Transistorized ‘Nor’ Gates Design

Abstract

The main difficulties for designing transistor switching circuits, as transistorized ‘Nor’ gates, are connected with process of optimization several conflicting demands, the combined effect of which cannot always be considered during calculations directly. In this paper the analysis of ‘Nor’ logic gates is formulated on the basis of graphic-analytic method^4,5, permitting to take into consideration the total influence of circuitry parameters, variations due to temperature, loading and technology tolerances, etc., in order to obtain the reliable switching mode of operations. It also allows to take into account dynamic and economic requirements for the further optimization, and from this point of view it can be very useful for many transistorized digital circuits including the integrated switching circuits for mass production.