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A 0.8V 40 Gb/s Novel CMOS Regulated Cascode Trans-impedance Amplifier for Optical Sensing Applications

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Abstract

This paper describes a 0.8 V 700 μW CMOS low-voltage regulated cascode trans-impedance amplifier (TIA). It reduces the need for extra bias voltages compared to other recent low-voltage regulated cascode topologies. A trans-impedance gain of around 60 dBΩ along with a 40 GHz bandwidth was achieved using the 0.13 μm IBM CMOS process technology. The input referred noise current spectral density was below \( {{{18{\mathrm{pA}}}} \left/ {{\sqrt {\mathrm{Hz}} }} \right.} \) within the -3 dB noise bandwidth. Eye diagram simulations using a −53dBm input photo-diode current signal and a 231-1 pseudo random bit sequence data pattern, indicates an eye opening of 90 % at 10Gbit/s and 50 % at 40Gbit/s. This proposed RGC TIA is thus a robust building block for numerous optical sensing applications with low bit error ratio (BER) figure.

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Correspondence to S. M. Rezaul Hasan.

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Hasan, S.M.R. A 0.8V 40 Gb/s Novel CMOS Regulated Cascode Trans-impedance Amplifier for Optical Sensing Applications. J Sign Process Syst 72, 63–68 (2013). https://doi.org/10.1007/s11265-012-0707-1

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  • DOI: https://doi.org/10.1007/s11265-012-0707-1

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