@inbook{0012c75b1ca5469294e4cdb82d4ed9c6,
title = "An inductorless linear optical receiver for 20Gbaud/s (40Gb/s) PAM-4 modulation using 28nm CMOS",
abstract = "This paper1 presents a linear optical receiver designed using a 28nm CMOS technology suitable for 20Gbaud/s (40Gb/s) PAM-4 modulation. The optical receiver consists of a transimpedance amplifier (gain adjustable from 40dBω to 56dBO) followed by a variable gain amplifier (gain adjustable from 6dB to 17dB). Capacitive peaking is used to achieve a bandwidth of ∼10GHz, thus avoiding the use of on-chip inductors which require large die area. A robust automatic gain control loop is used to ensure a constant differential output voltage swing of ∼100mV for an input dynamic range of 20μA to 500μA (peak current). Over this same range, high linearity (total harmonic distortion less than 5\%, 250MHz sinewave, 10harmonics taken into account) is obtained. The rms input referred noise current (integrated from 10MHz to 20GHz) was 2.5μArms. The linear optical receiver consumes 56mW from a 1.5V supply voltage.",
keywords = "automatic gain control, linear receiver, Optical communication, transimpedance amplifier, variable gain amplifier",
author = "Quadir, \{Nasir Abdul\} and Townsend, \{Paul D.\} and Peter Ossieur",
year = "2014",
doi = "10.1109/ISCAS.2014.6865674",
language = "English",
isbn = "9781479934324",
series = "Proceedings - IEEE International Symposium on Circuits and Systems",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "2473--2476",
booktitle = "2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014",
address = "United States",
note = "2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014 ; Conference date: 01-06-2014 Through 05-06-2014",
}