Current mirror circuit

US6657422B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Patrick Heyne · Hersbruck, DE
• Thilo Marx · Villingen-Schwenningen, DE
• Thomas Hein · Hersbruck, DE
• Torsten Partsch · San Jose, US

Key dates

• Filing date: Dec 27, 2001
• Grant date: Dec 2, 2003
• Expiry date: Dec 27, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/262
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A current mirror circuit has an input path, which has a current source and, connected in series therewith, a first transistor circuit with at least two transistors, wherein one of the transistors can be connected in parallel with the other of the transistors. In an output path, which has a second transistor circuit with at least two transistors, one of the transistors can be connected in parallel with the other of the transistors. The control terminals of the transistors of the first and second transistor circuits can be connected to the input path. As a result, the current mirror circuit can be changed over between two operating modes with a different current requirement with comparatively short changeover times.