DocumentCode :
2977369
Title :
Logarithmic Compensated Voltage Reference
Author :
Popa, C.
Author_Institution :
Fac. of Electron. & Telecommun., Univ. Politeh. of Bucharest, Bucharest
fYear :
2009
fDate :
11-13 Feb. 2009
Firstpage :
215
Lastpage :
218
Abstract :
Very important stages in applications such as AID and D/A converters, data acquisition systems, memories or smart sensors, voltage reference circuits and theirs temperature behavior are intensively studied in the last decade and many researches have been developed for improving them. The new proposed realization of a CMOS voltage reference uses a gate- source voltage of a MOS transistor working in weak inversion as CTAT voltage generator. The idea is that the negative linear dependent term from VGS (T) expression to be compensated by a complementary term implemented using an OVF (Offset Voltage Follower) block. The new curvature-correction technique proposes the compensation of the nonlinear temperature dependence of the gate-source voltage using an original block, ADA (Asymmetric Differential Amplifier), biased at drain currents with different temperature dependencies.
Keywords :
CMOS integrated circuits; MOSFET; compensation; differential amplifiers; operational amplifiers; reference circuits; CMOS voltage reference circuit; CTAT voltage generator; MOS transistor; OVF block; VGS (T) expression; asymmetric differential amplifier; complementary metal oxide semiconductor; gate-source voltage; logarithmic curvature-correction technique; nonlinear temperature dependence compensation; offset voltage follower; CMOS technology; Circuits; Data acquisition; MOS devices; MOSFETs; Photonic band gap; Temperature dependence; Temperature distribution; Temperature sensors; Threshold voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electron Devices, 2009. CDE 2009. Spanish Conference on
Conference_Location :
Santiago de Compostela
Print_ISBN :
978-1-4244-2838-0
Electronic_ISBN :
978-1-4244-2839-7
Type :
conf
DOI :
10.1109/SCED.2009.4800469
Filename :
4800469
Link To Document :
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