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Single Resistor Adjustment for Setting DC Output Voltage of Multiple Series Regulators

IP.com Disclosure Number: IPCOM000039912D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Riggio, SR: AUTHOR

Abstract

A technique is described whereby a single adjustable resistor, or potentiometer, provides for the setting of the direct current output voltages of multiple series regulators. In prior art, multiple series regulators utilized separate potentiometers for the adjustment of the DC output voltages in linear regulator power supplies. The concept described herein eliminates the need for more than one potentiometer in the setting of these DC output voltages. Potentiometer 10, as shown in the figure, represents the single component needed to provide the adjustment for proper regulation of the DC output voltages. Resistors R1 through R8 are one percent resistors, which, when used with high quality operational amplifiers 11, that have offset output voltages of less than five millivolts, will produce very stable output voltages.

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Single Resistor Adjustment for Setting DC Output Voltage of Multiple Series Regulators

A technique is described whereby a single adjustable resistor, or potentiometer, provides for the setting of the direct current output voltages of multiple series regulators. In prior art, multiple series regulators utilized separate potentiometers for the adjustment of the DC output voltages in linear regulator power supplies. The concept described herein eliminates the need for more than one potentiometer in the setting of these DC output voltages. Potentiometer 10, as shown in the figure, represents the single component needed to provide the adjustment for proper regulation of the DC output voltages. Resistors R1 through R8 are one percent resistors, which, when used with high quality operational amplifiers 11, that have offset output voltages of less than five millivolts, will produce very stable output voltages. Therefore, the output voltages of the main power output stages 12 will retain a regulation of plus or minus two percent, as required by many multiple output voltage power supplies.

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