Charge pump apparatus and method used in an identification tag
US7564358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Feb 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0331
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An identification (ID) tag includes a substrate having an input capable of receiving a high frequency signal. A first charge pump is coupled to the input and is configured to convert the high frequency signal to a substantially direct current (DC) voltage. A state machine is disposed on the substrate and is responsive to a data recovered by the second charge pump, where the state machine is capable of generating the control signal for the back scatter switch in response to the data. The DC voltage from the first charge pump is capable of providing a voltage supply for at least one of the data recovery circuit, the back scatter switch, and the state machine. The data recovery circuit includes a second charge pump that is capable of operating on the high frequency signal simultaneously with the first charge pump. In other words, the first charge pump can generate the supply voltage for the ID tag from the high frequency signal, while the second charge pump simultaneously retrieves the data from the high frequency signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.