The High Speed Electronics Laboratory (HSEL) was established in 1997 by Professor M.C. Frank Chang. Our research focuses in mixed-signal circuit and IC developments in the following areas: RF and THz RF/CDMA/FDMA and AC coupled multi-band interconnects for reconfigurable and bi-directional intra- and inter-chip communications, especially for on-chip chip-multiprocessors (CMP) inter-core communications and off-chip bus interfaces (e.g., between CPUs and memories) and serial/parallel links Silicon based RFIC and MMIC up to the terahertz frequency bands SDR Software-defined or reconfigurable multi-band and multi-mode radios in deep-scaled CMOS based on digitally controlled artificial dielectric (DiCAD) ADC/DAC Adaptive high speed and high resolution ADC/DAC for real-time multi-function systems