Voltage regulator circuit
US9128505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2010 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Jun 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/575
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator circuit comprises an amplifier (10) having a first input coupled to a first reference voltage node; a power pass element (20) having a control terminal coupled to an output of the amplifier, an input coupled to a power supply input of the voltage regulator circuit, and an output coupled to an output of the voltage regulator circuit; a feedback circuit (30, 31) having an input coupled to the output of the power pass element and an output coupled to a second input of the amplifier; and a compensation module (60) comprising a transistor (61), wherein a gate or base terminal of the transistor is coupled to a second reference voltage node, a drain or collector terminal of the transistor is coupled to the output of the amplifier, and a source or emitter terminal of the transistor is coupled to the power supply input of the voltage regulator circuit. The voltage regulator circuit is capable to increase the power supply rejection ratio of low drop-out voltage regulators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.