Title :
Low-voltage rail-to-rail bulk-driven CMFB network with improved gain and bandwidth
Author :
Castano, Fernando ; Torelli, Guido ; Pérez-Aloe, Raquel ; Carrillo, Juan M.
Author_Institution :
Dept. of Electr., Electron. & Control Eng., Univ. of Extremadura, Badajoz, Spain
Abstract :
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.
Keywords :
CMOS integrated circuits; MOSFET; feedback; low-power electronics; operational amplifiers; voltage control; DC gain; bulk-driven MOS transistor; gain-bandwidth product; low-voltage rail-to-rail CMOS continuous-time common-mode feedback network; operational transconductance amplifier; partial positive feedback; signal swing; size 0.35 mum; voltage control; Bandwidth; Bulk-driven MOS transistors; common-mode feedback; fully differential amplifiers; low-voltage; partial positive feedback;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724490
