Detector of range of supply voltage in an integrated circuit
US6943592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2004 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Jun 1, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/16519
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure relates to detectors of the level of supply voltage in an integrated circuit. The disclosed detector is designed to detect the crossing of low levels of supply voltage. It comprises a first arm to define a first reference voltage and a second arm to define a second reference voltage, these two reference voltages varying differently as a function of the supply voltage and their curves of variation intersecting for a value of the supply voltage located close to a desired threshold. A comparator receives the two reference voltages. The first arm has a resistive divider bridge, an intermediate connector of which constitutes the first reference voltage. The second arm comprises a resistor series-connected with a native P type MOS transistor, the point of junction of this resistor and this transistor constituting the second reference voltage. A non-linear element may be parallel-connected to the resistor which constitutes the first reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.