Title :
High accuracy current sense amplifier with extended input common mode range
Author :
Puşcaşu, Rǎzvan ; Brînzoi, Pavel ; Creoşteanu, Laurentiu ; Brezeanu, Gheorghe
Author_Institution :
Telecommun. & Inf. Technol., Univ. Politeh. of Bucharest, Bucharest, Romania
fDate :
June 30 2014-July 3 2014
Abstract :
A high accuracy current sense amplifier with input common mode range extending beyond the positive supply rail is presented. The offset voltage is minimized using an auto-zero topology with a fully differential internal path. Characteristics of the presented amplifier include an input voltage range of 30V, independent of the supply rail, a fixed gain with a typical gain error of 0.05% and a referred-to-input offset voltage of less than 10μV in the -40°C to 125°C temperature range. The proposed architecture was implemented in a 0.5μm CMOS process and its performances were confirmed by post-layout simulation results.
Keywords :
CMOS analogue integrated circuits; differential amplifiers; CMOS process; auto-zero topology; extended input common mode range; fully differential internal path; high accuracy current sense amplifier; positive supply rail; post-layout simulation; size 0.5 mum; temperature -40 degC to 125 degC; Accuracy; Computer architecture; Gain; Rails; Resistors; Transistors; Voltage measurement; auto-zero; current sense amplifier; extended input common mode range;
Conference_Titel :
Ph.D. Research in Microelectronics and Electronics (PRIME), 2014 10th Conference on
Conference_Location :
Grenoble
DOI :
10.1109/PRIME.2014.6872670
