High-Gain and High-Slew-Rate Two-Stage Class A–AB Op-Amp

Rashtian, Mohammad

doi:10.1007/s40998-021-00449-2

Cited by 17 publications

(1 citation statement)

References 24 publications

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“…In this way, some of the constant current sources have been replaced with active current mirrors, which have improved the amplifier's gain SR, and bandwidth [4]. Further improvements to the RFC OTA were proposed using extra dc current sources, active current mirrors, or circuit improvement [5][6][7][8]. Double RFC with higher DC gain and SR is also proposed in different topologies [9,10].…”

Section: Introductionmentioning

confidence: 99%

Adaptive double recycling folded cascode amplifier

Rashtian

2021

Analog Integr Circ Sig Process

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A new structure for improving the performance of recycling folded cascode (RFC) operational transconductance amplifier (OTA) is presented. The improvement has been achieved using two current recycling stages. The first current recycled stage acts as an adaptive biasing current source for the second stage. Compared to the RFC OTA, the proposed OTA shows a significant improvement in slew rate (SR), gain-band-width (GBW), and DC gain. Simulation results in 0.18 lm standard CMOS technology exhibit that the proposed OTA achieves an about three times improvement in SR, 12.4 dB DC gain enhancement, and approximately two times increase in gain bandwidth compared to the RFC OTA. The proposed OTA consumes 433

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