Current-mode thermal sensor
US12270714B2 · kind B2 · utility
0Cited by
10References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2022 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Jun 26, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/1659
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature sensor circuit is disclosed that uses multiple bipolar devices to generate a proportional to absolute temperature (PTAT) current and a complementary to absolute temperature (CTAT) current. A difference in the PTAT and CTAT current is evaluated using a feedback loop of an amplifier circuit which alternatively charges and discharges a capacitor to create a time-varying analog signal. A comparator circuit compares the analog signal to threshold values to generate an output digital signal whose duty cycle varies with temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.