caa a22 4500 606206027 CHVBK 20210128101009.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00034-014-9906-2 doi (NATIONALLICENCE)springer-10.1007/s00034-014-9906-2 Kulej Tomasz Department of Electrical Engineering, Technical University of Czestochowa, 42-201, Czestochowa, Poland aut 0.4-V Bulk-Driven Operational Amplifier with Improved Input Stage [Elektronische Daten] [Tomasz Kulej] A new solution for an ultra-low-voltage, low-power, bulk-driven operational amplifier is presented in the paper. The amplifier is based on a new input stage, exploiting the concept of partial positive feedback. As compared with prior work, the proposed input stage offers improvement of all basic performance metrics, including such important parameters as input-referred noise and offset voltage. In order to improve the DC voltage gain of the overall op-amp, a novel solution for an ultra-low-voltage, high-input-resistance common-mode amplifier has also been proposed. Simulated performance of the overall operational amplifier for a 50 nm CMOS process and supply voltage of 0.4 V shows power dissipation of 24 $$\upmu $$ μ W, the open-loop voltage gain of 60dB, and the gain-bandwidth product of 2.18 MHz for 20 pF load capacitance. Springer Science+Business Media New York, 2014 Bulk-driven MOSFETs nationallicence CMOS analog integrated circuits nationallicence Low-voltage circuits nationallicence Operational amplifiers nationallicence Partial positive feedback nationallicence Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/4(2015-04-01), 1167-1185 0278-081X 34:4<1167 2015 34 34 https://doi.org/10.1007/s00034-014-9906-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-014-9906-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kulej Tomasz Department of Electrical Engineering, Technical University of Czestochowa, 42-201, Czestochowa, Poland aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/4(2015-04-01), 1167-1185 0278-081X 34:4<1167 2015 34 34