Charge pump for intermediate voltage
US7279961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump generates a voltage higher than an intermediate voltage and a regulator circuit provides a first regulated voltage higher than the intermediate voltage. A second stage includes a regulator stage using the first voltage to provide the intermediate voltage from the first voltage. A charge pump provides a pump output voltage. The pump output voltage is divided and the divided voltage is presented to a first comparator that compares it with a reference voltage. The first comparator drives the gate of a first MOS transistor to regulate the pump output voltage to a regulated voltage related to the reference voltage. The regulated voltage is presented to a second comparator that compares it with the reference voltage. The second comparator drives the gate of a second MOS transistor to downconvert the regulated output voltage to an intermediate voltage related to the reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.