Supply voltage switching apparatus
US5801520A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for automatically switching a load between different supply voltages in dependence on varying voltage demands of the load includes a number of analog series regulators. The supply voltage connection terminals of the series regulators are connected to an individual one of the supply voltages while the output terminals of the series regulators are connected to the load to individually conduct current to/from the load in one and the same direction. The reference voltage input terminals of the series regulators are supplied with an individual reference voltage in response to the voltage demand of the load in such a manner that a series regulator connected to a supply voltage of a large absolute value is adapted to be supplied with a reference voltage of a smaller absolute value than a series regulator connected to a supply voltage of a smaller absolute value and strive to output voltage on its output terminal, which is of a smaller absolute value than the output voltage which a series regulator connected to a supply voltage of a smaller absolute value strives to output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.