Process independent temperature sensor based on oscillator
US9068896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Apr 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The inventive concept discloses a new temperature sensor structure based on oscillator which is insensitive to a process change and improves an error rate of temperature output. The temperature sensor based on oscillator compares an oscillator circuit structure insensitive to a temperature change with an oscillator circuit structure having a frequency change in proportion to a temperature change to output a relative difference between the two oscillator circuit structures and thereby it is compensated itself. In the temperature sensor based on oscillator, a problem of performance reduction due to an external environment and a process deviation of temperature sensor is improved and an output distortion and temperature nonlinearity are effectively improved. Thus, since the temperature sensor based on oscillator has a structure of high performance, low power and low cost, it can be variously used in a detection equipment of temperature environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.