Current sense circuitry
US12130311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2022 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | May 1, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Current sense circuitry includes: a current mirror circuit for sensing a power transistor current; a capacitor directly connected to the current mirror circuit at a first node; and a comparator circuit having a first input electrically connected to an input terminal of the current mirror circuit, a second input electrically connected to a drain or source terminal of the power transistor, and an output that is in a first state when a voltage at the first input is higher than a voltage at the second input and in a second state when the voltage at the first input is lower than the voltage at the second input. Current is sourced to the first node if the power transistor is on and the comparator output is in the second state, and sunk from the first node if the power transistor is on and the comparator output is in the first state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.