EP 2067090 B1 20100728 - VOLTAGE REFERENCE ELECTRONIC CIRCUIT
Title (en)
VOLTAGE REFERENCE ELECTRONIC CIRCUIT
Title (de)
SPANNUNGSREFERENZ-ELEKTRONIKSCHALTUNG
Title (fr)
CIRCUIT ELECTRONIQUE DE REFERENCE DE TENSION
Publication
Application
Priority
- EP 2007060624 W 20071005
- FR 0608789 A 20061006
Abstract (en)
[origin: US2010007324A1] 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.
IPC 8 full level
G05F 3/30 (2006.01)
CPC (source: EP US)
G05F 3/30 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008040817 A1 20080410; AT E475925 T1 20100815; DE 602007008115 D1 20100909; EP 2067090 A1 20090610; EP 2067090 B1 20100728; FR 2906903 A1 20080411; FR 2906903 B1 20090220; US 2010007324 A1 20100114
DOCDB simple family (application)
EP 2007060624 W 20071005; AT 07820997 T 20071005; DE 602007008115 T 20071005; EP 07820997 A 20071005; FR 0608789 A 20061006; US 44425207 A 20071005