Back to results
US 2006/0220733 A1Published application
Temperature-independent current source circuit
AssigneeFairchild Korea Semiconductor Ltd.
InventorsJong-Tae Hwang, Dong-Hwan Kim, Yun-Kee Lee
Life of this patent
Estimating the term…
Abstract
A temperature-independent current source is provided, which includes a current source generating a current that is proportional to the temperature and a current source generating a current that is inversely proportional to the temperature. Values of the circuit elements are selected so that the currents of the current sources add up to a substantially temperature-independent current. Related current sources utilize dual-base Darlington bipolar transistors to generate a temperature-independent current.
Claims8
A current source comprising:
- a first Darlington transistor having a first terminal for receiving a first current, a grounded second terminal, and a control terminal coupled to the first terminal;
- and
- a second Darlington transistor having a first terminal for outputting a second current, a second terminal grounded through a first resistor, and first and second control terminals respectively coupled to the first and second control terminals of the first Darlington transistor.
Dependencies are inferred from the claim text.