Current sensing by using aging sense transistor
US12385953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2023 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Sep 27, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/0822
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current sense circuit that allows for accurate sensing of a power current that flows through a power transistor as the power transistor ages. The circuit includes the power transistor, a sense transistor and a pull-up component. The control nodes of the power transistor and the sense transistor are connected, causing the power transistor and sense transistor to be on or off simultaneously. The pull-up component is connected between the input node of the power transistor and the input node of the sense transistor. When power is provided to the pull-up component, and when each of the power transistor and sense transistor are off, the pull-up component forces a voltage present at the sense transistor input node to be approximately equal to a voltage present at the power transistor input node, causing the sense and power transistors to age together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.