Reference voltage circuit
US8174309B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2010 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a reference voltage circuit in which a temperature characteristic of a reference voltage is excellent and a circuit scale is small. In the reference voltage circuit, for example, a temperature correction circuit separated from the reference voltage circuit is not used and a difference voltage between threshold voltages of two E-type NMOS transistors (14 and 15) is added to a threshold voltage of a D-type NMOS transistor to generate a reference voltage (Vref). Therefore, the influence of the D-type NMOS transistor on the reference voltage (Vref), which is a degradation factor of the temperature characteristic of the reference voltage (Vref), may be reduced to suppress a change in tilt and curve of the reference voltage (Vref) with respect to a temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.