Reference voltage generating circuit with ultra-low power consumption
US7309978B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2006 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Jun 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/5018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reference voltage generating circuit with ultra-low power consumption, which includes: a constant current circuit part generating a first constant current from a supply voltage; a current mirror circuit part mirroring the constant current and supplying a second constant current; a voltage control circuit part receiving the second constant current and generating a first reference voltage by using substrate transistors driven by a PTAT (Proportional To Absolute Temperature) voltage and MOS transistors driven by a CTAT (Complementary To Absolute Temperature) voltage; and an output circuit part amplifying an output voltage from the voltage control circuit part to generate second to fourth reference voltages, and feeding back at least one of the second to fourth reference voltages to the voltage control circuit part so that the magnitude of an output voltage is adjusted. The reference voltage generating circuit is able to stably output four reference voltages, independently of changes in supply voltage, process, temperature, and other factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.