Power supply controller for electronic circuits, components and corresponding devices
US6803751B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Oct 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A power supply controller for electronic circuits, supplying a power supply voltage (VDC) and preventing operation of the said circuit by using a RESET signal when the said power supply voltage is less than a first predetermined threshold. The controller includes a first comparator (C2) comparing a voltage proportional to the power supply voltage with a reference voltage and activating the reset signal when the voltage proportional to the power supply voltage is less than the reference voltage. A bandgap module supplies a principal reference voltage (VBGAP). Preliminary reference devices immediately supply a preliminary reference voltage (V09), less than the principal reference voltage. Control circuits receive the preliminary reference voltage (V09) and the principal reference voltage (VBGAP) and automatically activate the RESET signal for as long as the principal reference voltage (VBGAP) has not reached a second predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.