Precision resistor with improved temperature characteristics

Details Precision resistor with improved temperature characteristics Precision resistor with improved temperature characteristics

1979-09-04

1982-03-02

Albritton, C. L.

Electrical resistors

Resistance value temperature-compensated

29610R, 29613, 338275, 338314, 338316, H01C 706

Patent

active

043180728

ABSTRACT:
A precision resistor using a resistance metal film etched into a long serpentine strip cemented to a substrate. This substrate is a composite of rigid materials and plastics. The composite thermal coefficient of expansion of the substrate is given a non-linearity which in turn induces a stress related non-linear resistance change in the cemented film when the temperature changes. This stress-induced non-linear change is of approximately the same shape as the inherent non-linearity of the resistance versus temperature of the metal film, but opposite in polarity, over a wide range of resistor operating temperatures. Over that range, a much closer approximation to complete temperature compensation is obtained than previously.

REFERENCES:
patent: 3071749 (1963-01-01), Starr
patent: 3405381 (1968-10-01), Zandman et al.
patent: 3517436 (1970-06-01), Zandman et al.
patent: 3818413 (1974-06-01), Krimmel
patent: 4028657 (1977-06-01), Reichelt

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