Power supply independent temperature sensor
US6157244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature sensor is fabricated in an integrated circuit in combination with another device such as a microprocessor using a fabrication technology that is suitable for fabricating the device. Operation of the temperature sensor is based on the bandgap physics of semiconductors using a bandgap reference circuit and an amplifier that generate two measurement voltages, a voltage that is temperature-dependent and a voltage that is temperature-independent. The temperature sensor includes a bandgap power supply circuit that supplies a power supply voltage that is very stable to drive the temperature sensor so that the temperature sensor generates an output signal that is essentially independent of the power supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.