Reference current generating circuit using on-chip constant...

Details Reference current generating circuit using on-chip constant... Reference current generating circuit using on-chip constant...

2008-11-28

2010-10-26

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

C327S513000

Reexamination Certificate

active

07821324

ABSTRACT:
Provided is a reference current generating circuit capable of maintaining a constant output level regardless of a temperature variation by the use of a reference resistor having a constant resistance regardless of the temperature variation. The reference current generating circuit includes a reference voltage circuit supplying a reference voltage having a constant level regardless of a temperature variation, and a reference resistor circuit comprising a resistor having a positive temperature coefficient and a resistor having a negative temperature coefficient that are connected in series, the reference resistor circuit having a constant total resistance regardless of the temperature variation. Herein, a reference current having a constant level regardless of the temperature variation is generated by the reference voltage and the resistance of the reference resistor circuit.

REFERENCES:
patent: 5434533 (1995-07-01), Furutani
patent: 6211661 (2001-04-01), Eckhardt
patent: 6348832 (2002-02-01), Chih
patent: 6351111 (2002-02-01), Laraia
patent: 7504878 (2009-03-01), Lin
patent: 7616050 (2009-11-01), Eckstein
patent: 1998026260 (1998-07-01), None
patent: 100228354 (1999-08-01), None
patent: 2000-17044 (2000-03-01), None
Korean Office Action for application No. 10-2008-0081880, issued Jul. 24, 2010.

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