DC-DC converter with reduced electromagnetic interference
US6969978B2 · kind B2 · utility
166Cited by
35References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2003 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Mar 17, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2215/067
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-DC converter includes a variable frequency oscillator, a control system and a power train. The DC-DC converter is well suited for use in a cell phone. The control system uses the output of the oscillator to control the power train. The oscillator varies its frequency as a function of a pseudo random number generator, thereby reducing electromagnetic interference caused by ripple in the output of the DC-DC converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.