Band-gap reference self-starting circuit and a passive radio frequency identification tag
US9195924B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 8, 2013 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Apr 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the field of radio frequency, and provides a band-gap reference self-starting circuit and a passive radio frequency identification tag. The self-starting circuit comprises: a first switch device unit, configured to generate a first leakage current in an off state; a second switch device unit, configured to generate a second leakage current lower than the first leakage current in the off state, and generate a control voltage according to the first leakage current and the second leakage current; a control unit, configured to generate a starting control signal according to the control voltage; and a band-gap reference generating unit, configured to generate a reference voltage according to the starting control signal, and control the second switch device unit to enter dormancy using the reference voltage. The present invention boosts the control voltage using the leakage current generated by a field effect transistor in the off state, thereby implementing self-starting and generating the reference voltage, and controls the starting control unit to enter dormancy after the reference voltage is generated, thereby reducing system power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.