Rectifier and limiter circuit having a plurality of time constants and passive radio frequency tag
US9899934B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 5, 2016 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Jul 5, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the technical field of radio frequency identification, in particular to a rectifier and limiter circuit having a plurality of time constants and a passive radio frequency tag containing this rectifier and limiter circuit. By applying analog control signals with different time constants to control terminals of two discharge paths of the rectifier and limiter circuit, respectively, i.e., adjusting the voltage amplitude at different switching speeds, switching the two discharge paths from a completely open state to a completely closed state is realized. Discharging is performed properly according to the amount of charge at antenna terminals and the level of energy of the tag, thus to improve the demodulation capacity of the tag and increase the read-write distance of the tag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.