Transimpedance amplifier with an integrated analog equalizer

We present a transimpedance amplifier in the optical receiver front-end featuring with an integrated equalizer up to 45 Gb s−1. It integrates a Schottky-junction varactor diode at the input. The equalization in frequency-domain can be achieved by varying the applied voltage at the Schottky diode. For this end, the proposed circuit was fabricated and measured in both frequency and time-domain. By measuring S-parameters up to 45 GHz and eye-waveforms at 40 and 45 Gb s−1, the proposed circuit manifests its functionality as the transimpedance amplifier with an integrated analog equalizer.

[1]  Liang-Hung Lu,et al.  A Transimpedance Amplifier With a Tunable Bandwidth in 0.18-$\mu{\hbox{m}}$ CMOS , 2010, IEEE Transactions on Microwave Theory and Techniques.

[2]  H. Bach,et al.  Optimization of Photodiode Bandwidth Employing Peak Distortion Analysis , 2013, Journal of Lightwave Technology.

[3]  S. Sze,et al.  Physics of Semiconductor Devices: Sze/Physics , 2006 .

[4]  A.C. Carusone,et al.  A 3-Tap FIR Filter With Cascaded Distributed Tap Amplifiers for Equalization Up to 40 Gb/s in 0.18-$mu$m CMOS , 2006, IEEE Journal of Solid-State Circuits.

[5]  Jiashu Chen,et al.  Design and Analysis of a Stage-Scaled Distributed Power Amplifier , 2011, IEEE Transactions on Microwave Theory and Techniques.

[6]  L. Roy,et al.  1 W, Highly Efficient, Ultra-Broadband Non-Uniform Distributed Power Amplifier in GaN , 2013, IEEE Microwave and Wireless Components Letters.