Low voltage, current-mode, piecewise-linear curvature corrected

Details Low voltage, current-mode, piecewise-linear curvature corrected Low voltage, current-mode, piecewise-linear curvature corrected

1998-04-07

1999-09-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327513, 323313, 323315, G05F 110

Patent

active

059528737

ABSTRACT:
A bandgap circuit (16) for supplying a reference voltage includes a first current source (AI.sub.Vbe) supplying a current proportional to a base-emitter voltage, a second current source (BI.sub.PTAT) supplying a current proportional to absolute temperature, and a third current source (CI.sub.NL) supplying a non-linear current. First (R3), second (R2), and third (R1) resistors are coupled in series between a first node (c) and ground. The first current source is coupled to the first node. The second current source is coupled to a second node (a) between the first and second resistors. The third current source is coupled to a third node (b) between the second and third resistors. An output coupled to the first node supplies the reference voltage Vref. The bandgap circuit provides a low voltage reference with temperature compensation flexibility.

REFERENCES:
patent: 4897595 (1990-01-01), Holle
patent: 5325045 (1994-06-01), Sundby
patent: 5774013 (1998-06-01), Groe
patent: 5821741 (1998-10-01), Brokaw

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