Modern complementary metal oxide semiconductor (CMOS) digital-to-analog
converters (DACs) are limited in their bandwidth due to technological
constraints. These limitations can be overcome by parallel DAC
architectures, which are called interleaving concepts. Christian Schmidt
analyzes the limitations and the potential of two innovative DAC
interleaving concepts to provide the basis for a practical
implementation: the analog multiplexing DAC (AMUX-DAC) and the frequency
interleaving DAC (FI-DAC). He presents analytical and discrete-time
models as a theoretical foundation and develops digital signal
processing (DSP) algorithms to compensate the analog impairments.
Further, he quantifies the impact of various limiting parameters with
numerical simulations and verifies both concepts in laboratory
experiments.
About the Author:
Christian Schmidt works at the Fraunhofer Heinrich-Hertz-Institute,
Berlin, Germany, on innovative solutions for broadband signal generation
in the field of optical communications. The studies for his dissertation
were carried out at the Technische Universität Berlin and at the
Fraunhofer Heinrich-Hertz-Institute, both Berlin, Germany.