Programmerbar signalanpassning
The data acquisition system COMET developed by Saab AB contains a unit for signal conditioning and A/D conversion, called KSM. The varieties in signal conditioning constitutes of a number of specific PBAs and maintenance as well as reconfiguration of these are complicated not to mention costly. This thesis has aimed to investigating whether the signal conditioning circuits can be replaced by a general purpose, programmable solution. If so, how can this be done? The development has been carried out by evaluating ideas through the use of a laboratory environment and has resulted in an analog design for laboratory purpose. A reconfigurable design is the result of this thesis as an alternative to the solution used today. In the proposed design mainly digital otentiometers, switches and MUXes are used. In that way signal path and overall behaviour can be selected. Some extensions have been made in comparison to the current functionality, but additional development is necessary to make the design complete. Future versions of the COMET system could be significantly improved by considering the result of this thesis when developing the signal conditioning circuitry.