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: WO2008040817A1] The invention relates to a circuit for a voltage reference that is independent from the temperature. The circuit comprises a first bandgap-type circuit (C1) supplying a first-order temperature-stable voltage from a base-emitter voltage of a bipolar transistor (T3) having a negative variation slope that is a function of the temperature, and from a voltage or a current (I2) having a positive variation slope that is a function of the temperature and supplied by a generator that generates a current proportional to the absolute temperature. The base currents of the PMOS transistors of the latter are compensated so that the output current is proportional to a collector current and not to an emitter current. An adder (ADD) establishes a linear combination with respective weighing coefficients of three voltages that respectively consist in the output voltage EG(T) of the first circuit (C1), the output voltage of a second circuit (C2) supplying a voltage E2(T) that is proportional to the difference between the absolute temperature T and a reference temperature Tr, and the output voltage E3(T) of a third circuit (C3) supplying a voltage that is proportional to the square of that 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