Precision resistor with improved temperature characteristics
US4318072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1979 |
| Grant date | Mar 2, 1982 |
| Priority date | — |
| Expiry date | Sep 4, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49087
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.