Open Access180 Gbit/s 4:1 power multiplexer for NRZ‐OOK signals with high output voltage swing in SiGe BiCMOS technology
Author(s) -
Uhl C.,
Hettrich H.,
Möller M.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.2557
Subject(s) - multiplexer , bicmos , electrical engineering , electronic engineering , swing , engineering , computer science , voltage , transistor , multiplexing , mechanical engineering
A 4:1 multiplexer (MUX) circuit in SiGe BiCMOS technology intended to directly drive a plasmonic Mach–Zehnder modulator for transmitter applications is presented. To achieve the highest data rates at a high output voltage swing, a power MUX concept is applied that maps the high‐speed performance of the final clock signal onto the output data. In the clock tree a novel wideband 90 ° clock phase shifter circuit is utilised for timing adjustment and frequency doubling. Electrical measurements of the chip demonstrate open eye diagrams for non‐return‐to‐zero on‐off‐keying (NRZ‐OOK) signals up to 180 Gbit/s, which is record speed for Si‐based technologies. A differential output voltage swing of 300mV ppwas measured that corresponds to an output voltage swing of more than 1V ppwithout the bandwidth limit of the measurement equipment.