Low noise bandgap reference circuit and method for providing a low noise reference voltage
US10963000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2017 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Nov 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bandgap reference circuit and a method for providing a reference voltage are disclosed. In an embodiment a bandgap reference circuit includes a voltage generator including a first branch and a second branch and being configured to produce a reference voltage with a temperature coefficient lower than a given threshold, a supply circuit configured to provide a first current to the first branch and a second current to the second branch, and a control loop including a transconductance amplifier configured to provide an output signal representative of a difference between a first voltage of the first branch and a second voltage of the second branch and a filter coupled to an output of the transconductance amplifier, the filter configured to provide an output signal for controlling the first current and second current of the supply circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.