Voltage regulator circuit with high power supply rejection ratio
US11036247B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2019 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Nov 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator circuit includes a power supply terminal and a ground terminal, and a differential amplifier coupled between the power supply terminal and the ground terminal. The voltage regulator circuit also includes an output transistor, which includes a gate node coupled to an output node of the differential amplifier to receive a gate voltage and to provide a regulated output voltage at an output node of the output transistor. The differential amplifier is configured to provide the gate voltage based on a differential between a reference voltage and the regulated output voltage. The voltage regulator also includes a compensation capacitance coupled between a virtual ground node in the differential amplifier and either the power supply terminal or the ground terminal and a virtual ground node in the differential amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.