Precision on chip bias current generation

Details Precision on chip bias current generation Precision on chip bias current generation

2008-02-27

2009-06-30

Zweizig, Jeffrey S (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

07554387

ABSTRACT:
Bias current generation circuits and systems are disclosed. In one embodiment, a bias current generation system comprises a current generation circuit generating a first current based on a first voltage and an external resistor, a current mirror forwarding a second current proportional to the first current, and one or more bias current generation circuits with each circuit generating a bias current based on a second voltage over a resistance of a transistor device, where the transistor device is maintained in a triode region using a third voltage associated with the second current and where the resistance of the transistor device shares characteristics of a resistance of the external resistor.

REFERENCES:
patent: 5300837 (1994-04-01), Fischer
patent: 5777509 (1998-07-01), Gasparik
patent: 6570436 (2003-05-01), Kronmueller et al.
patent: 6940338 (2005-09-01), Kizaki et al.
patent: 7365594 (2008-04-01), Kojima et al.
patent: 7514980 (2009-04-01), Choi et al.

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