Trimmable bandgap voltage reference

Details Trimmable bandgap voltage reference Trimmable bandgap voltage reference

2007-01-30

2007-01-30

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

Reexamination Certificate

active

10724440

ABSTRACT:
A bandgap reference includes a current source providing a current that is proportional to the sum of a first voltage having a positive-to-absolute-temperature (PTAT) temperature dependency and a second voltage having a complementary-to-absolute-temperature (CTAT) dependency. The bandgap reference further includes a variable resistor comprising a fixed resistor that may be selectively combined with one or more of a plurality of selectable resistors, wherein the first voltage is inversely proportional to the resistance of the variable resistor.

REFERENCES:
patent: 5291122 (1994-03-01), Audy
patent: 6501256 (2002-12-01), Jaussi et al.
patent: 6891357 (2005-05-01), Camara et al.
“A CMOS Bandgap Reference Circuit With Sub-I-V Operation,” by Hironori Banba et al., IEEE Journal of Solid-State Circuits, vol. 34, No. 5, May 1999.

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