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Microprocessor World-Wide Line Voltage Controller

IP.com Disclosure Number: IPCOM000039818D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Clemo, RM Riggio, SR Steinmetz, MJ [+details]

Abstract

A technique is described whereby an electrical circuit, using digital codes to represent the range of an AC voltage, provides the controls necessary to enable a single power supply to function in accordance with all world-wide line voltage specifications. The circuit also eliminates the need to insert or remove jumpers, or engage a mechanical switch, as was required in the prior art. As a result, utilizing this circuit enables a computer system, or similar units, to install only one power supply type, regardless of the voltage ranges seen by that system. The electrical circuit to provide the voltage control is shown in the figure and, for simplification, components such as clamping diodes, decoupling capacitors, pull-ups and rectifier filter are not shown.