Precision power resistor with very low temperature coefficient of resistance
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United States of America Patent
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Jun 30, 1987
Grant Date -
N/A
app pub date -
Nov 20, 1984
filing date -
Nov 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A precision resistor exhibiting a temperature coefficient of resistance which is very low and which is virtually independent of time, and capable of accepting high power, comprises a resistive foil applied to a substrate by means of an appropriate cement, wherein the coefficient of thermal expansion of the substrate is either at zero or as close to zero as is possible, and wherein the resistivity versus temperature characteristic of the foil selected is adjusted so as to compensate for the thermal strain induced change in resistance which results when the temperature of the assembly changes, and the device is reacting to the application of power virtually without creating a transient phenomenon due to the flow of heat. Also a method for producing such a precision resistor.
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