Voltage compensation of temperature coefficient of resistance in an integrated circuit resistor
US4229753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1977 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Aug 18, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A circuit technique is disclosed for compensating for changes in the resistance of an integrated circuit resistor in an epitaxial bed, which is exposed to temperature changes. The resistance of an integrated circuit resistor is a function of the temperature at which is operates. The invention is based on the recognition that the resistance of the resistor is also a function of the potential difference between the body of the resistor and the epitaxial bed itself. Temperature compensation is achieved by connecting a temperature sensing circuit to the epitaxial bed, which has a voltage output which varies inversely with respect to the temperature coefficient of resistance of the resistor. Thus, the net change in the resistance of the resistor as it undergoes a temperature change, approximates zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.