Readout electronics for the ATLAS semiconductor tracker

The binary readout architecture as a base-line and the analogue one as a fall-forward option have been adopted recently by the ATLAS SemiConductor Tracker (SCT) group for the readout of silicon strip detectors. A brief overview of different architectures considered before as well as the status of the binary readout development will be presented. A new idea of the binary readout architecture employing a dual threshold scheme will be discussed and new results obtained for the full analogue readout chip realised in the DMILL technology will be reported.