Sense Inhibit-Card G102

Summary This document is an electrical schematic for a "Sense Inhibit-Card" (part number 6102-0-1) manufactured by Digital Equipment Corporation.

The circuit is designed to handle four channels of signal input (Data 1 through 4) and provide corresponding outputs (Data Out 1 through 4 and Inhibit 1 through 4). Key components shown in the diagram include:

• Transformers (T1–T4): Used for the sense input lines (1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B).
• Logic Gates: A series of integrated circuits (E1–E6) used to process clocking, reset, and data inhibit timing signals.
• Transistors (Q1–Q4): Used as output drivers for the data channels.
• Diodes (D2, D6, D10, D14): Serving as protective or steering components in the output stages.
• Support Components: Various resistors and capacitors (including high-voltage 1500MMF capacitors) used for filtering and signal stabilization.

The schematic also includes notes on component values, voltage references (+5V, -6V, -1.5V), and a conversion chart for the transistors and diodes used.