Limiter for controlling overvoltage and RFID tag having the same
US7482930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2006 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Feb 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A limiter for controlling an overvoltage and an RFID tag having the same are provided. The limiter includes a first limiter part and a second limiter part serially connected to the first limiter part. The second limiter part has at least one limit diode whose threshold voltage is lower than that of elements in the first limiter part. Accordingly, if an overvoltage is input, the limiter can maximize the input current drop so that the limiter can maximize the leakage voltage. As a result, the RFID tag can prevent the RFID driving part from being damaged due to the overvoltage. In addition, the RFID tag can normally operate regardless of the intensity of the driving voltage input from the RFID reader, so that the yields of products can improve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.