Voltage regulator for a charge pump circuit
US6774709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for regulating an output voltage of a charge pump includes a regulator connected to an output of the charge pump. The regulator includes a voltage divider for dividing the output voltage. A filter has a first input for receiving the divided output voltage, a second input for receiving a control signal, and an output for providing a filtered divided output voltage. A comparator has a first input for receiving the divided output voltage, a second input for receiving a reference voltage, a third input for receiving the filtered divided output voltage, and an output for providing a digital signal based upon a comparison of the divided output signal, the reference voltage and the filtered divided output voltage. A logic control circuit has a first input for receiving a clock signal, a second input for receiving the digital signal from the comparator, and an output for providing a timing signal. A phase generator circuit has an input for receiving the timing signal from the logic control circuit for generating control phases for the charge pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.