Requirements/ideas/proposal for a future gas detector pixel readout device

The Timepix development is regarded as an important outcome of the EUDET project. This note explains the background to the development as well as its general context. The positive experience with Timpix leads to new ideas for future developments which might be better adapted to the requirements of the EUDET users and other particle physics applications. The options for such a development are outlined and the design choices and their implications briefly discussed.