Proceedings ArticleDOI
An ultra-low voltage, ultra-low power fully recycling folded cascode amplifier
Meysam Akbari,Omid Hashemipour,Ardavan Javid +2 more
- pp 514-518
TLDR
In this paper, a new ultra-low power fully recycling folded cascode amplifier with low supply voltage is presented, which benefits from higher transconductance, slew rate and gain in comparison with conventional recycling folded cascade.Abstract:
A new ultra-low power fully recycling folded cascode amplifier with low supply voltage is presented. The new configuration benefits from higher transconductance, slew rate and gain in comparison with conventional recycling folded cascode. Furthermore, the phase-margin is enhanced and the input referred noise is reduced in this new configuration. Simulation results in standard 0.18 μm CMOS technology shows that the proposed amplifier achieves 316% improvement in gain bandwidth and 11 dB boosts in DC gain in comparison with the conventional folded cascode amplifier. The amplifier consumes 240nW @ 0.6 V which make it suitable for low-power biomedical applications.read more
Citations
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Journal ArticleDOI
Ultra-low power OTA based on bias recycling and subthreshold operation with phase margin enhancement
Ahmed Ragheb,HyungWon Kim +1 more
TL;DR: An ultra-low power and wide bandwidth operational transconductance amplifier (OTA) that provides the advantages of rail-to-rail input and output swing, while presenting lower power consumption and higher DC gain than conventional FC with enhanced current recycling technique is presented.
Journal ArticleDOI
Design and analysis of folded cascode OTAs using Gm/Id methodology based on flicker noise reduction
Meysam Akbari,Omid Hashemipour +1 more
TL;DR: In this paper, a new methodology for design of folded cascode (FC) and recycling folded cascade (RFC) OTAs based on 1/f noise reduction is presented, which leads to the larger DC gain and gain-bandwidth, and phase margin degeneration.
Proceedings ArticleDOI
Enhanced gain, low voltage, rail-to-rail buffer amplifier suitable for energy harvesting
TL;DR: In this article, a CMOS subthreshold rail-to-rail input-output buffer amplifier for energy harvesting applications is presented, having high gain (A V ) of ∼ 130dB, consuming ultra low currents (I DD ), and operating with low power supply voltage (V DD ) > ∼ 0.8v.
Journal ArticleDOI
Improving power efficiency of a two-stage operational amplifier for biomedical applications
TL;DR: An improved folded cascode operational transconductance amplifier (OTA) that operates in weak inversion region is designed by using compensation technique with feed-forward path, which has higher DC gain, unity gain frequency and slew rate without adversely affecting the noise and offset performance.
Journal ArticleDOI
An efficient approach to enhance bulk-driven amplifiers
TL;DR: In this article, a single-stage class AB bulk-driven amplifier operating in weak inversion region is proposed, which benefits from an improved high input swing structure using quasi-floating-gate technique.
References
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Journal ArticleDOI
The Recycling Folded Cascode: A General Enhancement of the Folded Cascode Amplifier
R. Assaad,Jose Silva-Martinez +1 more
TL;DR: A recycling amplifier architecture based on the folded cascode transconductance amplifier is described, which delivers an appreciably enhanced performance over that of the conventional folded by using previously idle devices in the signal path, which results in an enhanced transc conductance, gain, and slew rate.
Journal ArticleDOI
Double recycling technique for folded-cascode OTA
TL;DR: This is a double-recycling folded cascode (DRFC) operational transconductance amplifier (OTA), demonstrating another phase of significant performance enhancement over the existing fold cascode, recycling folded cascodes and improved recycling folded cascade counterparts.
Journal ArticleDOI
A transconductance enhanced recycling structure for folded cascode amplifier
Xiao Zhao,Huajun Fang,Jun Xu +2 more
TL;DR: The proposed structure introduces a positive feedback path to achieve a significant boost in transconductance without increasing power or area consumption and results show that the proposed amplifier achieves 400% improvement in gain-bandwidth and 16.6 dB boost in DC gain compared to the conventional folded cascode.
Proceedings ArticleDOI
Gain and bandwidth boosting techniques for high-speed operational amplifiers
M.M. Amourah,Randall L. Geiger +1 more
TL;DR: Two techniques to simultaneously increase bandwidth, transconductance, and DC gain of an amplifier without changing the excess bias or the power dissipation are described.
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The Recycling Folded Cascode: A General Enhancement of the Folded Cascode Amplifier
R. Assaad,Jose Silva-Martinez +1 more