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Interleaving Active Feedback in Inverter-Based Optical Receivers for Bandwidth Extension and Linearity Improvement | IEEE Conference Publication | IEEE Xplore

Interleaving Active Feedback in Inverter-Based Optical Receivers for Bandwidth Extension and Linearity Improvement


Abstract:

Main amplifiers are crucial components in the design of optical receivers, amplifying the output voltage of the transimpedance amplifier (TIA). While Cherry-Hooper (CH) a...Show More

Abstract:

Main amplifiers are crucial components in the design of optical receivers, amplifying the output voltage of the transimpedance amplifier (TIA). While Cherry-Hooper (CH) amplifiers are widely utilized in optical receivers due to their high bandwidth, they often fall short in linearity, making them less suitable for PAM-4 and higher-order modulation schemes. This study presents a highly linear PAM-4 optical receiver design. The proposed main amplifier employs gm/gm inverter-based amplifiers known for their superior linearity. We have applied the interleaving active feedback (IAFB) technique to enhance bandwidth while mitigating gain peaking. Notably, our proposed design operates with a 1 V supply, offers a bandwidth of 20 GHz at a gain of 64 V/V, and achieves a total harmonic distortion (THD) of less than 1% for a 600 mVpp differential output swing.
Date of Conference: 19-22 May 2024
Date Added to IEEE Xplore: 02 July 2024
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Conference Location: Singapore, Singapore

References

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