The CSI Chip—A CMOS Charge-Successive Integrator With a Wide Dynamic Range for the Telescope Array Project
نویسندگان
چکیده
A charge-successive integrator (CSI) VLSI with a wide dynamic range has been developed for the front-end electronics of the Telescope Array project. The CSI has more than a 14-bit dynamic range and successively integrates the charge from a photomultiplier tube every 200 ns. We have newly designed an offset-compensated charge integrator to reduce the offset voltage and the 1 noise. We expect that the offset voltage and the maximum 1 noise can be reduced to less than 2 mV and 0.2 V/sqrt Hz, respectively, with this technique. The prototype CSI chip was fabricated using a 0.6m commercially available CMOS technology. The test results of a prototype CSI chip, which has no offset compensation, are compared to the offset-compensated low-1 noise CSI to confirm the effectiveness of this technique.
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