Bandgap reference voltage failure detection

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United States of America Patent

PATENT NO 10345844
APP PUB NO 20170147027A1
SERIAL NO

15427854

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Abstract

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An integrated circuit is provided with a bandgap voltage reference circuit having a bandgap reference voltage output. A bandgap failure detection circuit is coupled to the bandgap reference voltage output. The bandgap failure detection forms a model value of the reference voltage from a first time, compares a present value of the reference voltage at a second time to the model value; and asserts a bandgap fail signal to indicate when the present value is less than the model value by a threshold value. The integrated circuit is reset by the bandgap fail signal. The detection circuit may be operated from a failsafe voltage domain that also allows a critical circuit to complete a pending operation during a reset.

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Patent Owner(s)

  • AGILENT TECHNOLOGIES TEXAS INSTRUMENTS INCORPORATED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arnold, Matthias Freising, DE 50 214
Dornseifer, Frank Freising, DE 9 48
Gerber, Johannes Unterschleissheim, DE 25 123

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