Temperature dependent regulation of threshold voltage

Details Temperature dependent regulation of threshold voltage Temperature dependent regulation of threshold voltage

2005-07-12

2005-07-12

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

C327S534000

Reexamination Certificate

active

06917237

ABSTRACT:
Embodiments circuits provide a transistor body bias voltage so that the ratio of IONto IOFFis constant over a range of temperature, where IONis a transistor current when ON and IOFFis a (leakage) transistor current when OFF. In one embodiment, a nFET is biased to provide IONto a current mirror that sources a current AIONto a node, a nFET is biased to provide IOFFto a current mirror that sinks a current BIOFFfrom the node, and an amplifier provides feedback from the node to the body terminals of the nFETs so that at steady state AION=BIOFF, where A and B are constants independent over a range of temperature. In this way, the ratio ION/IOFFis maintained at B/A for some range of temperatures. Other embodiments are described and claimed.

REFERENCES:
patent: 6087892 (2000-07-01), Burr

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