Author/Authors :
Pacciani، نويسنده , , Luigi and Uberti، نويسنده , , Olga and Del Monte، نويسنده , , Ettore and Argan، نويسنده , , Andrea and Feroci، نويسنده , , Marco and Soffitta، نويسنده , , Paolo and Trois، نويسنده , , Alessio and Costa، نويسنده , , Enrico and Donnarumma، نويسنده , , Immacolata and Evangelista، نويسنده , , Yuri and Lazzarotto، نويسنده , , Francesco and Rapisarda، نويسنده , , Massimo and Morel، نويسنده ,
Abstract :
In this paper we report the procedure developed and the results achieved for the equalization of threshold levels for the 6144 discriminator units of XAA1.2 ASICs chosen for the SuperAGILE X-ray imager onboard the AGILE satellite. For these kinds of imager, we will show that the threshold equalization is a critical issue. For each XAA1.2 we reduced the threshold dispersion by a factor of 3–4, and a factor of ∼ 2 for daisy chains of ASICs. Despite the method being developed for XAA1.2, the discriminator units and threshold fine-adjustment circuits are common to other chips of XA and VA-TA family, so that the algorithm and results can be extended to these two families of ASICs. This work may be useful for the design of electronic boards where the threshold equalization is a crucial issue.
Keywords :
Coded mask , Silicon microstrip , Threshold , ASIC , X-Ray , Discriminator
