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We present the preamplifier for the readout of the 988 large mass bolometers of the CUORE experiment. Each bolometer is based on a 750 g TeO2 crystal on which a Nuclear Transmutation Doped Ge thermistor, NTD Ge, is glued, in good thermal contact. To read out the detectors we have developed a differential voltage sensitive preamplifier based on a well selected and properly biased input JFET and by...
We present our circuit solution for the second stage of the front-end readout of an array of mu-bolometers, cryogenic detectors having Si or Ge thermistor as sensing element. The front-end consists in a cold unity gain buffer stage (with single sided input connection) followed by a room temperature second differential amplifying stage. The optimization of the input transistor of the set-up has been...
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