Method and circuit for switching source modulation frequency
US6791375B2 · kind B2 · utility
2Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Dec 8, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The DC to DC converter has an oscillator and generates an output voltage to drive a system. The modulation frequency is used for modulating a pulse width modulation (PWM) circuit in the DC to DC converter. The method includes steps of: 1. providing the modulation frequency from the oscillator; 2. switching the source of the modulation frequency from the oscillator to the system clock to provide the modulation frequency when the system is driven by the output voltage from the DC to DC converter; and 3. stopping the oscillator for reducing a power loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.