Ground reference generator for power converter
US12381485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2023 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Feb 8, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ground reference circuit to generate a ground reference for a voltage reference circuit includes a resistor coupled in series with a transistor via a current mirror. The resistor is coupled between a ground reference terminal of the voltage reference circuit and a ground terminal of a power converter. The transistor control terminal is configured to receive a pulse width modulation (PWM) control signal having a duty cycle similar to a switching element duty cycle of the power converter. The current mirror circuit is coupled between a current terminal of the transistor and the ground reference terminal. A controller configured to control the switching element duty cycle may include the ground reference circuit, along with the voltage reference circuit, and a PWM circuit configured to determine the switching element duty cycle based on a comparison between a reference voltage provided by the voltage reference circuit and the converter output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.