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Unlike signal switching, power switches have significant minimum operational requirements for both voltage and current that affect usage in test programs (TPSs) and self test approaches. In addition to TPS usage and testing considerations, power switches must also be maintained since they have a tendency to build up deposits on their contacts which can degrade the characteristics of the switch. However, there are techniques which can reduce or remove build up of deposits, improving switch operation. These topics are presented in this paper.
Date of Publication: August 2012