Regulated current mirror
US7463013B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/262
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A regulated mirror current source circuit has an output transistor, a regulator for controlling the output circuit, and a current mirror having two or more current paths. The first path of the mirror is coupled in series with a current path of the output circuit, and the second path is coupled to the regulator, to provide feedback. The feedback can provide better precision, or reduced component area. The circuit can include cascode transistors, and the regulator can have integral control. The output transistor gate-source voltage is overdriven to reduce “on” resistance of the output transistor. When the output transistor is a high voltage transistor, its area can be reduced without sacrificing compliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.