Flexible circuit for droop detection
US11630161B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2021 |
| Grant date | Apr 18, 2023 |
| Priority date | — |
| Expiry date | Nov 8, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power supply monitor includes a delta-sigma modulator including an input receiving a binary number and an output providing a pulse-density modulated signal, the delta-sigma modulator operable to scale the pulse-density modulated signal based on the binary number. A fast droop detector circuit includes a level shifter providing the modulated signal referenced to a clean supply voltage. A lowpass filter is coupled between the level shifter and a comparator. The comparator produces a droop detection signal at said output responsive to a monitored supply voltage dropping below a predetermined level relative to the filtered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.