My main area of research is analog integrated circuits with
emphasis on digital communication applications and signal processing.
In that past, I have been involved with oversampling, analog
filters, analog and digital adaptive filters, switched-capacitor filters,
phase-locked-loops, equalization, line-drivers. My present
research topics are mostly related to digital communication systems and
circuits. I have students investigating free-space optial links
(up to 1Gb/s), high-speed (622Mb/s) over 300m of coax and twisted-pair
with full-duplex operation (and hence echo cancellation), high-speed
chip-to-chip communications, as well as oversampling A/D converters.
In general, my research involves significant
signal processing and digital communication concepts but also
a strong hardware component where things are designed, built and tested.