Wideband low dropout voltage regulator with power supply rejection boost
US9921593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2016 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present disclosure provides a detailed description of techniques for implementing a wideband low dropout voltage regulator with power supply rejection boost. More specifically, some embodiments of the present disclosure are directed to a voltage regulator comprising a voltage regulator core powered by a supply voltage and providing a regulated voltage output, and a power supply feed forward injection module delivering an injection signal to the voltage regulator core to effect a power supply rejection of the supply voltage variation from the regulated voltage. In one or more embodiments, the injection signal is determined from the supply voltage variation and a gain factor that is based on various design attributes of the output stage of the voltage regulator core. In one or more embodiments, the power supply feed forward injection module comprises a supply voltage sense circuit, a low pass filter, and one or more selectable transconductance amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.