Efficient switching of output stage power driver
US12323056B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2021 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Oct 4, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/122
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The circuits and methods described herein provide technical solutions for technical problems facing power driver circuits. To reduce or eliminate effects associated with a gate capacitance discharge current and inconsistent effective Vbias, the discharge process may be split into two phases. During a first phase, the transistor gate charge is drained into ground through a large path gate. The ground (GND) features a very low impedance, hence the resulting δVbias(t)|phase_1 is negligible even for high discharge currents. The transistor gate node voltage (Vgate) is constantly monitored, and the discharge process switches from the first phase to the second phase when Vgate transgresses a bias voltage threshold based on the target value of Vbias. To switch from the first phase to the second phase, the current path into GND is cut by switching its path gate to an OFF state, and an alternative path is enabled between transistor gate charge and Vbias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.