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Operational Transconductance Amplifiers
2023The foremost chapter gives the topic context of electrocardiography (ECG or EKG), a diagnostic procedure used to evaluate the heart's rhythm and record electrical Activity for different heart conditions. The electrical signal has three main components: P wave, QRS complex, and T wave.
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Instrumentation amplifiers using operational transconductance amplifiers
International Journal of Electronics, 1991Instrumentation amplifier circuits using operational transconductance amplifiers (OTAs) as active circuit elements are proposed in this paper. Two new instrumentation amplifier circuits have been described and experimentally verified, where the first circuit comprises four OTAs and five resistors and the second circuit comprises two OTAs and three ...
WANLOP SURAKAMPONTORN +3 more
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Subthreshold operation of Nauta's operational transconductance amplifier
2015 IEEE 13th International New Circuits and Systems Conference (NEWCAS), 2015This paper investigates the subthreshold operation of the inverter-based operational transconductance amplifier for the potential use in very low power data conversion systems. Circuit analysis and sizing strategies are presented, and a first order continuous-time delta-sigma modulator circuit is used as a case study to verify the performance of the ...
Astria Nur Irfansyah +4 more
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The Research of Operational Transconductance Amplifier
2011 International Conference on Control, Automation and Systems Engineering (CASE), 2011A topology structure of operational transconductance amplifier is proposed to be devised in this paper. In order to make it have the feature of high-speed, large bandwidth, and high stability, a two-stage cascode structure amplifier is designed by using cascaded single-stage amplifier.
Feiyue Jin +4 more
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Operational Transconductance Amplifiers (OTAs)
2014This chapter describes operational transconductance amplifiers (OTAs) and their linearization for use in g m -C filters. Super-source-follower and digitally programmable OTAs are detailed. The common-mode feedback used in these OTAs and a buffer amplifier are described. A OTA implemented in 120 nm CMOS is introduced inclusive measured results.
Heimo Uhrmann +2 more
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2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353), 2002
A family of CMOS Operational Transconductance Amplifiers (OTA's) have been designed for very small G/sub M/'s (of the order of nA/V) in the moderate inversion region of operation using several design schemes such as current division, floating gate input stages and bulk driven techniques.
A. Veeravalli +2 more
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A family of CMOS Operational Transconductance Amplifiers (OTA's) have been designed for very small G/sub M/'s (of the order of nA/V) in the moderate inversion region of operation using several design schemes such as current division, floating gate input stages and bulk driven techniques.
A. Veeravalli +2 more
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Designing operational transconductance amplifiers for low voltage operation
1993 IEEE International Symposium on Circuits and Systems, 2002To design operational transconductance amplifiers (OTAs) for high-performance applications it is necessary to use cascoded current mirrors. In low-voltage applications the standard cascoded current mirror cannot be used. The solution is to use the generalized high-swing cascoded current mirror.
P.J. Crawley, G.W. Roberts
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Transconductance cancellation for operational amplifiers
IEEE Journal of Solid-State Circuits, 1977A low-cost internally compensated integrated-circuit operational amplifier occupying a small die area can be fabricated if the compensation capacitor value is low. This objective is attained when the amplifier-input-stage transconductance is reduced to a minimum provided the frequency response remains unchanged.
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New Operational Transconductance Amplifiers using current boosting
2012 IEEE 55th International Midwest Symposium on Circuits and Systems (MWSCAS), 2012New techniques for Class-AB Operational Transconductance Amplifiers (OTAs) are presented. These new techniques are two topologies based on current boosting in class-AB stage which achieve considerable improvement of Slew Rate and Gain-Bandwidth while maintaining the same power consumption as the conventional design.
Mehdi Noormohammadi +2 more
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OVERVIEW OF OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA)
2023An essential component of electronic systems is the operational transconductance amplifier (OTA). A transconductor's job is to turn an input voltage into an output current. The transconductance amplifier can be set up to either amplify or combine currents or voltages.
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