Voltage level detector for battery charger control circuit
US4341988A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Jun 25, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/007182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage level detector for controlling a battery charger, includes a power supply circuit adapted to be coupled to a battery during charging thereof, a first voltage regulator for providing a supply voltage for the detector, the first voltage regulator being coupled to receive power from the power supply circuit, a second voltage regulator for providing a stable source of reference voltage, the second voltage regulator being coupled to receive power from the detector supply voltage, a voltage comparator having one input thereof coupled to the stable reference voltage source, circuitry for coupling the battery to the other input of the voltage comparator, the circuit for coupling being adapted to coupled a proportion of the battery voltage which proportion equals the stable reference voltage when the battery voltage reaches a predetermined maximum level, and control circuitry responsive to the output of the voltage comparator for controlling the charging of the battery in response to the battery voltage reaching the maximum desired level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.