0.8 V bulk-driven operational amplifier

A low-voltage bulk-driven CMOS operational amplifier is proposed in this paper. The inherent small transconductance of the bulk-driven devices is enlarged using a positive feedback, improving also the noise performance. The amplifier is designed using standard 0.18 μm n -well CMOS process. Although...

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Bibliographic Details
Published inAnalog integrated circuits and signal processing Vol. 63; no. 3; pp. 425 - 432
Main Authors Raikos, George, Vlassis, Spyridon
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.06.2010
Subjects
Analog circuits
Circuits and Systems
Electrical Engineering
Engineering
Integrated circuits
Operational amplifiers
Signal processing
Signal,Image and Speech Processing
Analog VLSI
Bulk-driven transistor
Amplifiers
Low-voltage
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Summary:A low-voltage bulk-driven CMOS operational amplifier is proposed in this paper. The inherent small transconductance of the bulk-driven devices is enlarged using a positive feedback, improving also the noise performance. The amplifier is designed using standard 0.18 μm n -well CMOS process. Although the amplifier is optimized for 0.8 V supply voltage, it is also capable to operate under supply voltage of 0.7 V. The amplifier consumes 130 μΑ, performing 56 dB open-loop gain, 154 nV/√Hz input-referred spot noise at 100 kHz, 80 dB CMRR at 100 kHz and IIP 3 equal to −4.7 dBV.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-009-9425-4