Digital temperature sensor circuit
US12044583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2017 |
| Grant date | Jul 23, 2024 |
| Priority date | — |
| Expiry date | Aug 1, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital temperature sensor circuit is disclosed. The digital temperature sensor circuit includes a proportional to the absolute temperature (PTAT) current source, generating a PTAT current proportional to absolute temperature; a sigma-delta modulation module, including an integrator, an analog-to-digital conversion unit, and a feedback digital-to-analog conversion unit; the integrator converts the PTAT current into temperature voltage; the analog-to-digital conversion unit compares the temperature voltage with a band gap reference voltage to generate a digital modulation signal with a duty ratio proportional to the temperature; the feedback digital-to-analog conversion unit adjusts the voltage input by the analog-to-digital conversion unit and controls the charging and discharging speed of the integrator; a digital filter, quantizing the digital modulation signal into a digital signal, and outputting the digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.