Reference current circuit and low power bias circuit using the same

US7750721B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Nikolay Ilkov · Munich, DE
• Udo Gerlach · Munich, DE

Key dates

• Filing date: Apr 10, 2008
• Grant date: Jul 6, 2010
• Expiry date: May 31, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/30
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A reference current circuit has an input configured to receive an input current, a first transistor, a second transistor, and an output configured to provide a reference current. The input is directly connected to a control input of the second transistor and a first terminal of the first transistor, and is connected via a first resistor to a control input of the first transistor. The output is connected to a first terminal of the second transistor. A reference node is connected via a second resistor to the control input of the first transistor, directly to a second terminal of the first transistor and via a third resistor to a second terminal of the second transistor.