3 Bit Parity Circuit B130

Summary: This document is a technical schematic for a 3-bit parity circuit (B130) manufactured by Digital Equipment Corporation in 1964. The circuit utilizes several transistors (DEC2894-1B, DEC3009A) and an SDA-8 component to process inputs and produce parity outputs. It includes a variety of diodes (D1-D22) and resistors to manage logic levels and signal flow, with power rails connected at +10V, ground, and -15V. The drawing also provides a transistor and diode conversion chart to reference the internal components used in the design.