Transistors in computer circuits

Summary form only given, as follows. Several applications of junction and point-contact transistors to basic computer circuits are described. These circuits emphasize types of applications best suited to the particular characteristics of these two types of transistors. The circuits employing junction transistors utilize the low input impedance and low saturation resistance of this type of transistor to achieve high circuit efficiency and a large reduction in the number of diodes required in many conventional computer circuits. Among these circuits described are flip-flop and counter stages, and logic circuits using transistors instead of diodes. The point-contact circuits make use of the regenerative properties and high speed capabilities of this type of transistor for such applications as pulse amplifiers and pulse shapers. Also described is a single-transistor bistable non-saturating type circuit for use in ring-counter applications and a four-transistor non-saturating counter stage for binary counter applications. Operational compatibility between these circuits is well illustrated. Performance data and circuit waveforms are presented together with general design considerations and life data, where available.