Reference current source having MOS transistors
US6492795B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/907
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A reference current source includes at least one first voltage-controlled current source, at least one second voltage-controlled current source, and an addition unit. The first voltage-controlled current source includes: at least one first control voltage source providing a first temperature-dependent control voltage, at least one first MOS transistor having a process gain, and an output providing a first current that is dependent on the control voltage and on the process gain of the first MOS transistor. The second voltage-controlled current source includes: at least one second control voltage source providing a second control voltage, at least one second MOS transistor having a process gain, and an output providing a second current that is dependent on the second control voltage and on the process gain of the second MOS transistor. The addition unit provides a reference current from the first current and the second current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.