Switching supply with pulse width and rate modulation
US4772995A · kind A · utility
25Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1987 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Jan 8, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33507
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching type power supply is described which employs pulse width and rate modulation. Enhanced control range is achieved by controlling a frequency determining circuit to increase operating frequency as a function of power switch pulse width. The power switch controls the switching of primary current in a transformer whose secondary supplies the output via a rectifier/filter circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.