Diode Gate Ri23

Summary: This document is a technical schematic from 1965 by the Digital Equipment Corporation for a "Diode Gate" circuit (model R123). The circuit consists of six parallel transistor-diode stages connected between a +10V supply and a -15V supply. Each stage includes a DEC 3639 transistor, two D-662 diodes, and a configuration of resistors (100kΩ and 15kΩ). The schematic also includes a reference table for transitor and diode conversions (listing DEC parts alongside their EIA equivalents) and specifies that all resistors are 1/4W with a 5% tolerance.