Flip-Flop R201

Summary: This document is a technical schematic for the "Flip-Flop R201" circuit, designed by Digital Equipment Corporation in 1964. The schematic illustrates a complex transistor-diode logic configuration involving two DEC 3639C transistors (Q1 and Q2) and a large array of diodes (D1 through D49) and capacitors. The circuit is designed to operate on a voltage supply of +10V and -15V. It includes specific component values, such as 1/4W resistors, and references a conversion chart for the transistors used in the design.