Survey of the State of the Art Analog Front End Circuit Techniques for ADSL

In the last several years, there has been increasing demand by consumers and small businesses for higher speed connectivity to the Internet. ADSL promises to fulfill the demand for faster data rates. However, in order to achieve the highest data rates for a given line, careful consideration must be given to the analog front end design such that it does not become the limiting factor. Based on recent publications, the fundamental techniques for building analog front ends are explored. Possibilities for future advancements in analog front ends are addressed in the conclusion.