Temperature sensor using digital double sampling
US11493388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2020 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Apr 21, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2219/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An on-chip temperature sensor for generating a digital output signal representing a temperature value includes: a proportional to absolute temperature (PTAT) buffer for alternately generating a first voltage signal representing a first temperature of the PTAT buffer and a second voltage signal representing a second temperature of the PTAT buffer; an analog to digital (A/D) converter, coupled to the PTAT buffer, for converting the first voltage signal to a first digital voltage signal and for converting the second voltage signal to a second digital voltage signal; and a digital output generating block, for receiving the first digital voltage signal and the second digital voltage signal, and comparing a difference between the first digital voltage signal and the second digital voltage signal with a digital voltage reference signal to generate the digital output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.