A very-high-slew-rate CMOS operational amplifier

Klinke, R.; Hosticka, B.J.; Pfleiderer, H.-J.

doi:10.1109/4.32035

Cited by 89 publications

(36 citation statements)

References 6 publications

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“…Ref. [17] compared three class-AB symmetrical OTA topologies: the ones from Degrauwe [8] and Klinke [9] are quite old and are not used in recent low voltage applications. For this reason, we preferred to consider more recent topologies based on similar principles (adaptive tail current source).…”

Section: Comparison Of Class Ab Topologiesmentioning

confidence: 99%

Comparative performance analysis and complementary triode based CMFB circuits for fully differential class AB symmetrical OTAs with low power consumption

Centurelli

Monsurrò

Trifiletti

2015

Circuit Theory & Apps

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SUMMARYIn this paper we extend the figures of merit for class AB symmetrical OTAs to the fully differential case and compare topologies from the literature. This analysis shows that the power consumption of the CMFB can have a significant role in determining the efficiency of the OTA, but on the other hand a CMFB is needed both to set the desired output common mode voltage and to improve the CMRR. We propose the complementary triode CMFB, i.e. a triode CMFB applied both at the NMOS and PMOS current mirrors, as suitable for class AB symmetrical OTAs, and show some case studies in deep submicron CMOS technology to assess the effectiveness of the proposed solution.

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Section: Comparison Of Class Ab Topologiesmentioning

confidence: 99%

Comparative performance analysis and complementary triode based CMFB circuits for fully differential class AB symmetrical OTAs with low power consumption

Centurelli

Monsurrò

Trifiletti

2015

Circuit Theory & Apps

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“…The nonlinear term of a source-coupled differential pair can be completely compensated by adaptive biasing [3], [5], [8], [12], [13] using the quadritail cell [8], [13]. The obtained tail current for adaptive biasing is…”

Section: The Completely Compensated Source-coupled Pairmentioning

confidence: 99%

“…The objective of this correspondence is to present a simple CMOS circuit reCopyright, 1996, IEICE, reprinted with permission from IEICE alization of a linear transconductance element consisting of an adaptively biased source-coupled differential pair operable on low voltage. The linearity and input voltage range of the proposed design is superior to that of the conventional adaptively biased source-coupled pairs [3], [8], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

A linear CMOS transconductance element of an adaptively biased source-coupled differential pair using a quadritail cell

Kimura

1996

Analog Integr Circ Sig Process

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A novel circuit design technique for realizing a linear CMOS transconductance element, consisting of an adaptively biased source-coupled differential pair using a quadritail cell, is proposed. In the circuitry, the quadritail cell, which provides an output current proportional to the square of a differential input voltage, cancels a nonlinear term of the source-coupled differential pair. The circuit have a superior linearity and a wide linear input voltage range compared with the conventional linear CMOS transconductance elements because the transconductance characteristic is theoretically linear over wide input voltage range when all the MOS field-effect transistors (MOSFETs) are operating in the saturation region and the MOSFETs' behaviors are according to the relation based on the square-law characteristic. The proposed adaptively biased source-coupled differential pair was verified by using transistor-arrays and discrete components on a breadboard.

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“…Often they also imply additional parasitic capacitances to the internal nodes (Degrauwe et al, 1981), degrading the small signal performance of the circuit which is already poor due to the low quiescent current. In some cases, the stability issues get worse due to the use of positive feedback or structures that are sensitive to variations in process and environmental parameters (Callewaert & Sansen, 1990), (Klinke et al, 1989). Although other contributions consider negative feedback (Harjani et al, 1999), the required additional amplifiers to implement the feedback loops lead to complex designs.…”

Section: Dynamic and Adaptive Biasingmentioning

confidence: 99%

“…One of the most important adaptive biasing techniques is the class AB operation. In this technique, the slew rate limitation is tackled by boosting automatically dynamic tail currents for large inputs, keeping a well-controlled low quiescent current (Degrauwe et al, 1981) , (Callewaert & Sansen, 1990), (Castello & Gray, 1985), (Tan & Chen, 2007), (Klinke et al, 1989), (Harjani et al, 1999).…”

Section: Dynamic and Adaptive Biasingmentioning

confidence: 99%

Achieving Energy Efficiency in Analogue and Mixed Signal Integrated Circuit Design

López-Morillo¹,

Márquez²,

Sánchez-Rodríguez³

et al. 2012

Energy Efficiency in Communications and Networks

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A very-high-slew-rate CMOS operational amplifier

Cited by 89 publications

References 6 publications

Comparative performance analysis and complementary triode based CMFB circuits for fully differential class AB symmetrical OTAs with low power consumption

Comparative performance analysis and complementary triode based CMFB circuits for fully differential class AB symmetrical OTAs with low power consumption

A linear CMOS transconductance element of an adaptively biased source-coupled differential pair using a quadritail cell

Achieving Energy Efficiency in Analogue and Mixed Signal Integrated Circuit Design

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