DePMOS based Active Pixel Sensor (APS) matrix is a new detector concept for X-ray imaging spectroscopy applications. This type of X-ray detectors can provide excellent energy resolution and high-speed readout. Both these features and the advantage of random pixel accessibility can fulfill the requirements of new space missions, like the XEUS Wide Field Imager. In a matrix arrangement, each pixel must be read out by a time variant filter, so a new readout mechanism and a proper multi-channel integrated shaping amplifier are needed. Finally, to operate at such a reduced processing time (e.g. 4 mus per line) DePMOS transistor can not be operated in the classical source follower configuration, because this results in a long settling time; so challenging design of full-custom multi-channel readout electronic has to be considered. We propose a new faster readout concept, which is based on the drain current readout.

VELA: The CMOS circuit based on fast current read-out for X-ray Spectroscopy with DePMOS

Porro M.;
2006-01-01

Abstract

DePMOS based Active Pixel Sensor (APS) matrix is a new detector concept for X-ray imaging spectroscopy applications. This type of X-ray detectors can provide excellent energy resolution and high-speed readout. Both these features and the advantage of random pixel accessibility can fulfill the requirements of new space missions, like the XEUS Wide Field Imager. In a matrix arrangement, each pixel must be read out by a time variant filter, so a new readout mechanism and a proper multi-channel integrated shaping amplifier are needed. Finally, to operate at such a reduced processing time (e.g. 4 mus per line) DePMOS transistor can not be operated in the classical source follower configuration, because this results in a long settling time; so challenging design of full-custom multi-channel readout electronic has to be considered. We propose a new faster readout concept, which is based on the drain current readout.
2006 IEEE Nuclear Science Symposium Conference Record
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10278/5009040
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