Methods and apparatus to sense a PTAT reference in a fully...

Miscellaneous active electrical nonlinear devices – circuits – and – External effect – Temperature

Reexamination Certificate

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C327S539000, C323S315000, C323S314000

Reexamination Certificate

active

07920015

ABSTRACT:
In a traditional, fully-isolated bandgap reference circuits, it was difficult to detect currents that are proportional to absolute temperature (PTAT). Here, a PTAT reference in a fully isolated NPN-based bandgap references are disclosed. These circuits in particular are able to make detections using various current without the need for stand-along operational amplifiers.

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patent: 2009/0110027 (2009-04-01), Chellappa
Rincón-Mora, G.A. “Bandgap Voltage Reference” ECE4430 Analog Integrated Circuits, 14 pages (metadata indicates document created on Dec. 2, 2002).
“Introduction to Bandgap Reference Generators,” Texas A&M University, 607(ESS), 18 pages (metadata indicates document created on Feb. 10, 2005).

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