Limiter circuit capable of continuously adjusting amplitude of rectified signal and passive radio frequency tag
US9792540B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 5, 2016 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Jul 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0701
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the present invention, by connecting a band-gap reference voltage module unit to a threshold unit of a limiter circuit, the ON-voltage of the threshold unit can be dynamically and continuously controlled; and the output voltage value of the band-gap reference voltage module unit can be arbitrarily set as needed for operating the circuit. When a voltage of the antenna terminal is higher than the sum of this band-gap reference voltage value and the respective threshold voltage of the serial MOS transistors, the threshold unit is turned ON to switch on a grounded path, so that charge at the antenna is output to the ground; in this way, the amount of charge at the antenna terminal is reduced and the rectified DC voltage is thus reduced. When the voltage at the antenna terminal is lower than the sum of this band-gap reference voltage value and the respective threshold voltage of the serial MOS transistors, the threshold unit is turned off to switch off the grounded path. The rectifier circuit rectifies all the charges at the antenna end into DC power for powering the load circuit. In this way, the function of continuously adjust the limited voltage is achieved, so that the limited vo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.