Power supply with pulse frequency modulating circuit calculating logic state changing
US7638989B2 · kind B2 · utility
0Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Feb 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1563
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for stabling a voltage, a pulse frequency modulating circuit and a power supply using the same are provided. The method includes the following steps. First, a comparing signal is provided. Then, set the comparing signal to be a first logic state when the voltage to be stabilized is lower than a preset voltage. Next provide a pulse signal when the comparing signal is set in the first logic state. Afterwards, adjust the enable time of the pulse signal based on the number of times of logic state changing of the comparing signal within a preset period and, adjust the voltage according to the enable time of the pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.