Switcher for switching capacitors
US6304007A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention discloses a switching device that switches an array of capacitors in series configuration in charging condition and switches an array of capacitors in parallel configuration in discharging condition for voltage stepdown DC to DC converter. This switcher can also be used for the voltage stepup conversion by charging an array of capacitors in the parallel configuration and discharging an array of capacitors in series configuration. The novel structure of this invention is to use the normally "offs" JFETs with both N-chamel and P-channel that provide low on resistance of sub-milliohm and large current for high efficiency energy conversions. This invention discloses the integrated structure of the switcher. The switcher built in common CMOS IC process is also disclosed in this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.