VOLTAGE REFERENCE ELECTRONIC CIRCUIT

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United States of America Patent

APP PUB NO 20100007324A1
SERIAL NO

12444252

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Abstract

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The invention relates to a temperature-independent voltage reference circuit. The circuit comprises a first circuit of bandgap type providing a first-order temperature-stable voltage, on the basis of a bipolar transistor base-emitter voltage having a negative slope of variation as a function of temperature, and of a voltage or a current having a positive slope of variation as a function of temperature provided by a generator of current proportional to absolute temperature. The base currents of the PMOS transistors thereof are compensated in such a manner that the output current is proportional to a collector current and not an emitter current. A summator establishes a linear combination, with respective weighting coefficients, of three voltages which are respectively the output voltage of the first circuit, the output voltage of a second circuit providing a voltage proportional to the difference between the absolute temperature T and a reference temperature Tr, and the output voltage of a third circuit providing a voltage proportional to the square of this difference.

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Patent Owner(s)

Patent OwnerAddress
E2V SEMICONDUCTORSFRENCH SHENGAIGELEIFU

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Coquille, Pierre Saint Theoffrey, FR 2 13
Debroux, Jean-Francois St. Etienne St. Geoirs, FR 8 83
Masson, Thierry Varces, FR 14 115

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