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A fully-differential, flipped-voltage-follower-based (FVF) transimpedance design for optical receivers with large-area photodetectors

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Abstract

This article presents a transimpedance amplifier (TIA) design suitable for 1 Gbps operation using a 4-level pulse amplitude modulation scheme. It is aimed toward communication protocols with large-area photodetectors, such as plastic-optical-fiber, visible light communications, and biomedical applications. The TIA leverages a flipped-voltage-follower as well as global current feedback to extend the bandwidth of the TIA and operates up to 400 MHz with a very low static power while driving a very large capacitance. The TIA has a static power consumption of only 1.2 mW at a 1 V supply voltage. Additionally, the fully-differential version of the proposed TIA is introduced in the case of using spatially-modulated light detectors. The design is validated with post-layout simulations employing a commercially available 40 nm CMOS process. Mismatch and corner simulations demonstrate that the proposed TIA can still provide the specifications in the worst-case scenarios.

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Funding

This work was supported by the Technological Research Council of Turkey under the Project TÜBİTAK 1001 118E253.

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Authors and Affiliations

  1. Istanbul Technical University Electronics and Communications Engineering, Istanbul, Turkey

    Ali Doğuş Güngördü, İrem Cömertoğlu & Mustafa Berke Yelten

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  1. Ali Doğuş Güngördü
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  2. İrem Cömertoğlu
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  3. Mustafa Berke Yelten
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All authors have contributed equally to the formation of this article.

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Correspondence to Mustafa Berke Yelten.

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Güngördü, A.D., Cömertoğlu, İ. & Yelten, M.B. A fully-differential, flipped-voltage-follower-based (FVF) transimpedance design for optical receivers with large-area photodetectors. Analog Integr Circ Sig Process 113, 241–248 (2022). https://doi.org/10.1007/s10470-022-02100-4

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