Low power switched-capacitor comparator
US10348283B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Feb 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage converter includes a comparator that continuously monitors an output voltage of the voltage converter. The comparator includes a first comparator core utilizing first and second switched capacitors and a second comparator core using third and fourth switched capacitors. The first comparator core is powered down or in a refresh mode while the second comparator core is monitoring the output voltage. The second comparator core is powered down or in the refresh mode while the first comparator core is monitoring the output voltage. The first and second switched capacitors are configured in series with an amplifier stage of the first comparator core while the first comparator core is monitoring the output voltage. The refresh mode charges the first (third) and second (fourth) switched capacitors to a scaled version of the output voltage and a reference voltage less an offset voltage, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.