Apparatus for determining radio state during charging in order to provide charge compensation
US5606241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Aug 22, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery charging system includes a battery pack (106) and charger (102). Battery pack (106) includes a selectable magnetic field generator (202) which is activated by radio controller (206) when radio (104) changes states. A Hall-effect switch (204) located in either charger (102) or battery (106) receives the magnetic field and informs charger monitor circuit (128) that radio (104) has changed states. This allows for charger (102) to modify the amount of current being provided to radio (104) via line (129). In a second embodiment, an infrared source (402) and an infrared detector (404) are used in place of selectable magnetic field generator (202) and Hall-effect switch (204).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.