Reference circuit with temperature compensation
US11609591B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2021 |
| Grant date | Mar 21, 2023 |
| Priority date | — |
| Expiry date | Jul 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/468
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention discloses a reference circuit with temperature compensation, which is characterized in that a current output circuit is designed to receive a reference voltage from a bias voltage generation circuit, generate two reference currents with opposite temperature variation characteristics, and then merge them into a compensated current with temperature compensation. In addition, a voltage output circuit is designed to receive a reference voltage from a bias voltage generation circuit, which includes several field-effect transistors operating in saturation regions, and a precision voltage increases with threshold voltages of the field-effect transistors to compensate for the temperature variation. Resistors can be incorporated or sizes of the field effect transistors can be changed to adjust the output current, output voltage or the temperature variation characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.