Current source, current source arrangement and their use

US8547030B2 · kind B2 · utility

Assignee

• AMS AG · AT

Inventors

• Peter Trattler · Graz, AT
• Stefan Wiegele · Graz, AT
• Manfred Pauritsch · Graz, AT

Key dates

• Filing date: Feb 4, 2011
• Grant date: Oct 1, 2013
• Expiry date: Dec 25, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/575
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A current source (10), comprising a bipolar transistor (1) including a control terminal and a controlled path, a first terminal on the controlled path, to which first terminal an electrical load (D1, D2) may be connected, a second terminal on the controlled path, which second terminal may be connected to a reference potential via a resistor (4), a measuring device (2) coupled to the control terminal for measuring a control current on the control terminal, a compensation device (3) coupled to the measuring device (2) and the bipolar transistor (1) in such a manner that the control current of the bipolar transistor (1) is compensated for at the first terminal of the controlled path.