Commutating switch development for critical applications

A consideration of the parameters that affect critical applications for motor driven commutator switches and a discussion of the degree to which such parameters are being improved through a new switch configuration. Critical applications include low impedance circuits (thermocouples and strain gages), high impedance low signal lead circuits, wide temperature, vibration and shock ambients, accurate timing conditions which do not permit bounce at make or break, and high life reliability. Examples of switch performance in typical circuits demonstrating low noise, bounce free commutation will be included in slides, based on the present production state of the art. Results of environmental testing will be discussed on the basis of available information. In particular, high temperature, acceleration, vibration and life conditions will be described.