Input current conditioner for precision coulomb counting
US9846196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 2015 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Jun 13, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3833
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system of counting coulombs drawn from a power source by a load. A reference current source regulates the current drawn by the load at any given time to be either zero or a predetermined fixed amount. A comparator controls a time the switch is closed and open. When the switch is closed, coulombs are allowed to be drawn from the power source, and prevented to be drawn when the switch is open. An oscillator generates a clock signal during the time the switch is closed. A counter counts the number of clock cycles from the clock signal during the time the switch is closed. The count is provided as a signal at a second output of the coulomb counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.