Current mirror circuit, driving circuit using the same, and...

Details Current mirror circuit, driving circuit using the same, and... Current mirror circuit, driving circuit using the same, and...

2008-03-25

2008-03-25

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

Reexamination Certificate

active

07348831

ABSTRACT:
A current mirror circuit is disclosed that is capable of supplying a desired second current regardless of whether the threshold voltages of the current mirror circuit's transistors are the same or different. The current mirror circuit includes a first transistor whose first terminal is electrically connected to a voltage source and whose gate terminal and second terminal are electrically connected to each other. A second transistor has a first terminal electrically connected to the voltage source and a gate terminal electrically connected to the gate terminal of the first transistor. A compensator that compensates for different threshold voltages of each of the first transistor and the second transistor is also included. Because differences in the threshold voltages of the transistors connected to the current mirror are compensated for, embodiments of the invention are able to generate a desired second current that can be used to power a driver or similar device. Additionally, the invention's current mirror circuit may function as a bias unit so that a driving circuit can be stably driven.

REFERENCES:
patent: 6768348 (2004-07-01), Shionoiri et al.
patent: 6806762 (2004-10-01), Stair et al.
patent: 2003-122307 (2003-04-01), None
patent: WO 01/02925 (2001-01-01), None

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