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A New Digital-Attenuator System for Hybrid Computers
NASA Contractor Report CR-87287 describing a digital attenuator system for analog/hybrid computers, developed at the University of Arizona's Analog/Hybrid Computing Laboratory. The system uses miniature metal-film ladder networks switched by latching reed relays for nondestructive coefficient memory, with serial data transmission allowing all 200 attenuators of a typical hybrid computer to be set within 20 milliseconds. The design replaces conventional servo-driven potentiometers to dramatically reduce problem setup time.
digital attenuatorshybrid computerscoefficient settingdigital-to-analog converters