International Business Machines Corporation

King M Chu

Prabjit Singh

Tuan D Ngo

William M Lorenz

Jeffrey A Newcomer

Gerald J Fahr

Gerard Vincent Weber, Jr

Andrew Rybak

George T Galyon

Kwok M Soohoo

Joseph W Bogdanski

William T Winkler

John P McConnell

A system for injecting noise signals onto power generated by a power source comprising: a voltage source; a device under test having a power input in operable communication with the noise introduction apparatus; and a noise introduction apparatus interposed between the power source and device under test in operable communication with the voltage source, the noise introduction apparatus comprising, a switching device configured to provide a low impedance conductive path when commanded, and a current limiting device in series with the switching device, the current limiting device configured to provide a low impedance conductivity for a selected current and a selected duration. The switching device and current limiting device cooperate to shunt the voltage source to the power input.

Method and apparatus for evaluating susceptibility to common mode noise in a computer system

An exemplary embodiment is a system and method for a device reliability test circuit. The method includes applying a DC voltage across the device for a period, wherein the DC voltage is less than the rated voltage of said device, and determining a failure point of the device based on applying the DC voltage.

System and method for a device reliability and test circuit

The power supply of equipment being tested for common mode noise problems is connected to a source of power with the power and neutral input terminals of the power supply isolated from the power ground. Recorded common mode noise signals are then inserted between the power supply's neutral input terminal and power ground to produce problem conditions. When the cause of the problem conditions are identified, steps are taken to eliminate the condition.

Apparatus and method for testing computer equipment for susceptibility to neutral to ground noise

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Wappingers Falls, NY, United States of America

King M Chu