Internal voltage controllers including multiple comparators and related smart cards and methods
US7750611B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2007 |
| Grant date | Jul 6, 2010 |
| Priority date | — |
| Expiry date | Jun 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/56
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage controller may include a pulse generator and an internal voltage control circuit coupled to the pulse generator. The pulse generator may be configured to generate a control signal in response to at least one of a mode signal and/or an external voltage. The internal voltage control circuit may be configured to generate an internal voltage at an internal voltage node, and the internal voltage control circuit may include a voltage divider, first and second comparators, and a driver. The voltage divider may be coupled between the internal voltage node and a first reference voltage, and the voltage divider may generate a feedback voltage that is between the internal voltage and the first reference voltage. The first comparator may be configured to generate a first comparison result responsive to comparing the feedback voltage with a second reference voltage, and the second comparator may be configured to generate a second comparison result responsive to comparing the feedback voltage with the second reference voltage in response to the control signal. The driver may be coupled between an external voltage and the internal voltage node, and the driver may be configured to genera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.