Back to results
US 2011/0031955 A1Published application
Constant current device
AssigneeAdvanced Connectek Inc.
InventorsChing-Chi Cheng, Wen-Hsiang Chien
Life of this patent
Estimating the term…
Abstract
A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output.
Claims16
A constant current device being connected to an external voltage source and comprising
- an input unit can vary a voltage across it to maintain a constant current and having an input being connected to the external voltage source;
- and
- an output;
- a driving transistor being used to output constant current;
- and
- a voltage control unit making the driving transistor outputting constant current and having
- a resistor voltage being voltage across the resistor;
- and comprising
- at least one resistor comprising an input and an output;
- and
- a semiconductor load.
8 more elements
Dependencies are inferred from the claim text.