Extended range regulated power supply
US4713554A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Apr 14, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An extended range regulated power supply which provides a constant output despite extreme variations in line potential, which in the present embodiment may exceed 50%. The power supply maintains high efficiency by operating with a first unregulated supply voltage just above the minimum voltage required by the linear regulator to maintain the desired output voltage. Upon severe low line or drop-out conditions, a second unregulated voltage supply is connected to the input of the linear regulators to maintain constant output voltage. Both of the unregulated potentials are derived from a transformer wherein the second unregulated source will be at least the voltage necessary for the regulators to maintain the desired output voltage under the maximum line drop-out voltage. The standby unregulated potential is switched by a solid state (FET) switch which acts instantaneously to provide a continuity of output voltage and may be configured to selectively switch in a range of standby potentials as well as a proportional pulse configured to provide modulated switching action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.