Micropower high current-drive class AB CMOS current-feedback operational amplifier

A novel CMOS current‐feedback operational amplifier (CFOA) aimed to low‐power applications is proposed. The use of a compact class AB implementation allows high current‐drive capability and simultaneously very low quiescent power consumption. Measurement results of a fabricated prototype show for an...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2011-09, Vol.39 (9), p.893-903
Main Authors: Lopez-Martin, Antonio J., Ramirez-Angulo, Jaime, Carvajal, Ramón G., Acosta, Lucía
Format: Article
Language:English
Subjects:
Amplification
analog CMOS circuits
analog integrated circuits
Bandwidth
CFOA
Circuits
class AB circuits
CMOS
current-feedback operational amplifier
Gain
Operational amplifiers
Power consumption
Slew rate
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Summary:A novel CMOS current‐feedback operational amplifier (CFOA) aimed to low‐power applications is proposed. The use of a compact class AB implementation allows high current‐drive capability and simultaneously very low quiescent power consumption. Measurement results of a fabricated prototype show for an inverting configuration a closed‐loop bandwidth of 1 MHz independent of gain setting, and a slew rate of 2V/µs for a load capacitance of 30 pF and a quiescent power consumption of 264µW. Copyright © 2010 John Wiley & Sons, Ltd. A low power class AB CMOS CFOA with high current drive capability, based on Quasi‐Floating Gate techniques, is presented. Measurement results of a fabricated test chip prototype are included and confirm the advantages of the proposed circuit. Copyright © 2010 John Wiley & Sons, Ltd.
ISSN:0098-9886
1097-007X
1097-007X
DOI:10.1002/cta.674