A front-end for an array of /spl mu/-bolometers for the study of the neutrino mass

We present a very low noise front-end solution for the readout of an array composed of 10 /spl mu/-bolometers. The system consists of a cold JFET and a room temperature second stage. The optimization of the second stage feedback configuration allowed to minimize the overall noise figure. A very simple current generator having a large output impedance has been developed and is used for biasing the cold JFET.