Hysteresis comparator circuit consuming a small current
US6163190A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 16, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jun 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K4/502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A hysteresis comparator circuit and a waveform generating circuit reduce a power consumption of a DC/DC converter so as to improve a power consumption efficiency when the DC/DC converter is operated with a relatively small load. The hysteresis comparator circuit is connected to a reference voltage source providing a reference voltage. A hysteresis comparator compares an input voltage with one of a first threshold voltage and a second threshold voltage. A hysteresis voltage generating circuit selectively generates one of the first and second threshold voltages by controlling a state of electric charge stored in each of the capacitors. An electric charge stored in the capacitors is provided from the reference voltage source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.