Formal analysis of bandwidth enhancement for high-performance active-input current mirror

Julien, Mohan; Bernard, Serge; Soulier, Fabien; Kerzérho, Vincent; Cathébras, Guy

doi:10.1109/dtis.2017.7930162

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Calculation Of the Initial Feedback Loop Gain1

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2018

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“…In [6], a dedicated formalism based on a 2 nd order generic model is introduced to design active-input current mirrors. It is shown that the OTA transconductance must be carefully defined to achieve the best speed-power ratio without any undesired oscillatory behavior.…”

Section: Calculation Of the Initial Feedback Loop Gainmentioning

confidence: 99%

Improvement of Active-Input Current Mirrors Using Adaptive Biasing Technique

Julien

Bernard

Soulier

et al. 2018

2018 Conference on Design of Circuits and Integrated Systems (DCIS)

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Dynamic CMOS current mirrors are used in a large variety of circuits as fundamental elements of analog design. Several topologies have been proposed over the years to improve their performances. Among these solutions, the activeinput technique is intended to increase speed-power ratio and input compliance. However, it has been proven that this structure suffers from a restricted input-current dynamic. In this paper, we propose an enhancement of the active-input structure relying on adaptive biasing to overcome the input current range limitation at low cost in terms of power consumption, noise and silicon area. Theoretical analysis demonstrates the efficiency of the proposed enhancement. Then, an example circuit realized in AMS CMOS 0.18 µm technology at 1.8 V supply is validated by simulation results.

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Section: Calculation Of the Initial Feedback Loop Gainmentioning

confidence: 99%