Compact voltage regulator with high supply noise rejection
US6144195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Aug 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/467
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An embodiment of the invention is directed to a voltage regulator that provides a conditioned reference voltage with high supply noise rejection. A reference circuit provides an input reference voltage. An operational amplifier (opamp) has a first opamp input coupled to the reference circuit, a second opamp input, and an opamp output to provide the conditioned reference voltage based on the input reference voltage. A differential MOS amplifier has a first input coupled to the opamp output and an output coupled to the second opamp input. The reference voltage is conditioned in accordance with the size of transistors in the differential amplifier. The voltage regulator may be used in different types of analog-to-digital converters, including those built for use with camera chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.