Signal power management circuits and smart cards including the same
US11469619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2021 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | May 12, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/77
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Signal power management circuits and smart cards including the same are provided. For example, a signal power management circuit comprises a rectifier that is configured to rectify a received radio frequency signal and output a first rectified voltage, a first regulator that is configured to maintain the first rectified voltage at a predetermined first voltage level, and a second regulator that is configured to receive an output of the first regulator and maintain a second rectified voltage different from the first rectified voltage at a predetermined second voltage level. A signal detector of the signal power management circuit is configured to receive the first rectified voltage and the second rectified voltage and detect a signal component of the received radio frequency signal on the basis of a difference between the first voltage level of the first rectified voltage and the second voltage level of the second rectified voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.