Voltage regulator and method for providing a regulated output
US7423416B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2007 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Sep 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A voltage regulator includes first and second MOS transistors and a bipolar transistor. The first MOS transistor has a first conductivity type and has a drain coupled to a first power supply voltage terminal, a gate for receiving a first bias voltage, and a source. The second MOS transistor has a second conductivity type and has a source coupled to the first power supply voltage terminal, a drain coupled to the source of the first MOS transistor, and a gate for receiving a second bias voltage. The bipolar transistor has a collector coupled to the source of the first MOS transistor, a base for receiving a third bias voltage, and an emitter for providing an output voltage. The first MOS transistor and the second MOS transistor control a voltage level at the collector of the bipolar transistor in response to a varying power supply voltage provided to the first power supply voltage terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.