Temperature measurement and calibration circuit, passive radio frequency identification tag and method for measuring temperature
US9915571B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 18, 2015 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Apr 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0717
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to the field of radio frequency identification, in particular to a temperature measurement and calibration circuit and a passive radio frequency identification tag. Meanwhile, the present invention further relates to a method for performing temperature measurement by using the tag. The temperature measurement and calibration circuit of the tag generates an upper reference voltage value limit and a lower reference voltage value limit, which do not change with temperature, then calibrates the upper reference voltage value limit and the lower reference voltage value limit to a uniform upper voltage value limit and a uniform lower voltage value limit, and eliminates the problem of different reference voltages of tags due to the power supply voltage fluctuation and process deviation. Meanwhile, a temperature measurement voltage generator circuit of the tag generates a calibration voltage value under a uniform calibration temperature. After the calibration voltage value is subjected to translational calibration, the calibration voltage values of the tags to be measured are equal, so that the consistency of temperature values of different tags is ensured. The…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.