Voltage regulator circuit for smart card ICs
US6747440B2 · kind B2 · utility
7Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2003 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/36
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The circuit contains a series regulator with an FET. A capacitor and a further FET, which is provided as a transfer gate and is driven by the POR signal, are connected in series between the source terminal, to which the external supply voltage is applied, and the gate connection. When the external voltage is applied, the FET opens, with the transfer gate switched on, corresponding to the charging of the capacitor which now takes place. Because this charging process takes a certain amount of time, overshoots in the internal voltage are prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.