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Low-voltage rail-to-rail bulk-driven CMFB network with improved gain and bandwidth

Low-voltage rail-to-rail bulk-driven CMFB network with improved gain and bandwidth,10.1109/ICECS.2010.5724490,F. Castano,G. Torelli,R. Perez-Aloe,J. M

Low-voltage rail-to-rail bulk-driven CMFB network with improved gain and bandwidth  
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A rail-to-rail CMOS continuous-time common-mode feedback (CMFB) network is introduced in this paper. The proposed scheme is based on the joint use of bulk-driven MOS transistors, which lead to high signal swing, and a partial positive feedback, which allows achieving enhanced DC gain and gain-bandwidth product. The proposed CMFB circuit is used to control the output voltage of a fully differential operational transconductance amplifier. Simulated results in standard 0.35-μm CMOS technology demonstrate the suitability of the approach.
Published in 2010.
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