Reference voltage generator permitting stable operation
US6535435B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 12, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Dec 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10B12/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reference voltage generation circuit is provided which includes a p-channel type MOSFET used as an input transistor to allow a sufficient current to flow through a differential amplifier even if the threshold voltages of MOSFETs used in the differential amplifier significantly increase. A push-pull conversion circuit is coupled to the differential amplifier and has a double end configuration to provide a sufficiently high level to drive a p-channel output buffer. This arrangement allows a stable operation at a sufficiently low power supply voltage even if the threshold voltages of the MOSFETs forming the differential amplifier are high. It also allows quick activation when the power is turned on and provides high stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.