Ten megapulse transistorized pulse circuits for computer application

Having demonstrated the overall feasibility of pulse circuitry in a parallel-organized computer, the next requirement was to build pulse-circuits for a model application. To guide the engineer in this effort, design ground-rules were established. A -10-volt power supply and 10-megapulse operation were immediately determined. An additional requirement specified that the circuits use high-speed PNP drift transistors and be capable of driving six 70-ohm coaxial lines. Pulses were 1-volt negative 1/2-sine wave, with a maximum width of 40 millimicroseconds. To optimize life, junction-temperature was limited to 60°C. A summary of the design ground-rules is shown.