This text contains the extended and revised editions of all the talks of the ninth AACD Workshop held in Hotel Bachmair, April 11-13, 2000, in Rottach-Egern, Germany. The aim of the workshop was to brainstorm on new and valuable design ideas in the area of analog circuit design. A series of nine books, published as a result of this conference and the previous eight, provides valuable information and good overviews of all analogue circuit techniques concerning design, CAD, simulation, and device modeling. These books can be seen as a reference to those people involved in analogue and mixed signal design.