Power supply adapter circuit
US6256385A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1998 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Aug 26, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adapter circuit PSA includes a comparator module OA, and a regulation module RM for normally adjusting the value of an output voltage Vout intended to be applied to an external circuit to a predetermined nominal regulation value Vreg0. In response to a measuring module SC sensing a reverse current flow at the output which is produced when an external power supply source in the external circuit connected to the output of the adapter circuit PSA includes an effective voltage source Vext which imposes on the output a voltage VDD which has a higher value than the nominal regulation value Vreg0, feedback coupled to an input to the comparator module OA is activated to raise the value to which the output voltage VDD is regulated to equality with the value of the effective voltage source Vext, thereby nulling the output current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.