Mobile telephone comprising an improved battery charger circuit
US6310461A · kind A · utility
4Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Jun 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00711
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The leakage current in a circuit for charging a battery is eliminated by placing a switch in series with the resistor connecting the emitter and the base of a transistor. When this switch is open the current can no longer flow through and there is therefore no longer any leakage current. This switch is controlled by a microprocessor through a bus and the battery can be charged in pulsed mode. Furthermore, the circuit has no protection diode against reverse voltage and over voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.