PTAT n bias cell for improved temperature performance

Details PTAT n bias cell for improved temperature performance PTAT n bias cell for improved temperature performance

2008-05-13

2008-05-13

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S513000, C330S289000

Reexamination Certificate

active

07372317

ABSTRACT:
A bias circuit is disclosed for use in a temperature compensation system. The bias circuit provides a current that is proportional to a temperature variation raised to an nth power where |n|>1 in accordance with an embodiment. In further embodiments, the bias circuit includes a PTAT current source for providing to a driver-stage amplifier a current that is substantially proportional to absolute temperature, and a CTAT current source for providing a current that is complementary to absolute temperature, wherein the PTAT and CTAT current sources coact to provide a PTAT2reference current that is proportional to an absolute temperature variation to the nth power wherein |n|>1.

REFERENCES:
patent: 6369657 (2002-04-01), Dening et al.
patent: 6946913 (2005-09-01), Moriwaki et al.
patent: 7119620 (2006-10-01), Pan
patent: 7245182 (2007-07-01), Koizumi

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