Diode Gate Bi35

This document is a technical schematic for a "Diode Gate" circuit, designated as model BI35, produced by Digital Equipment Corporation in 1966.

The circuit consists of three main transistor-diode stages (using 2N4258 transistors) configured to process multiple input signals (labeled D through U). It incorporates various resistors, capacitors (0.01 MFD), and D-662 diodes to manage signal logic and voltage levels, powered by +10V, -15V, and -3V sources. The schematic includes a component cross-reference table for transistors and diodes, notes on component specifications (1/4W, 5% resistors), and specific instructions for using the etch board of the BI15 module.