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A voltage buffer so-called the bulk-driven flipped voltage follower is presented. This proposal is based on the flipped voltage follower (FVF) technique, but a bulk-driven MOSFET with the replica-biased scheme is utilized for the input device to eliminate the DC level shift. The proposed buffer has been designed and simulated with a 0.35 mum CMOS technology. The input current and capacitance of our...
This paper presents a new design approach which can convert any CMOS operational amplifiers to have rail-to-rail common-mode input capability by utilizing few additional hardware elements. The proposed circuit can operate over a wide range of supply voltages from 1-volt to the maximum allowed for the CMOS process, without degrading the ac and dc performances of the amplifier in question over the rail-to-rail...
This paper presents a new design approach for a rail-to-rail bulk-driven input stage using a standard single-well (n-well in this paper) CMOS technology. This input stage can provide nearly constant transconductance and constant slew rate over the entire input common-mode voltage, operating with a wide supply voltage ranging from sub 1-volt (VT0+ 3VDSsat) to the maximum allowed for the CMOS process,...
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