Cascadable, high efficiency charge pump circuit and related methods
US6249446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2000 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Aug 23, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump circuit includes a plurality of pumping capacitors, a plurality of switches connected to the pumping capacitors, and a controller for generating first and second sets of switch control signals for controlling the switches so that the pumping capacitors generate either an increased or a negative output voltage. The controller includes a clock having first outputs for the first set of switch control signals, a transient clamp network having second outputs for the second set of switch control signals, and a respective level shifting capacitor connected between each first output and a corresponding second output and cooperating with the transient clamp network so that the second set of signals is level shifted from the first set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.