Linear Read out Electronics Associated with MWPC Cathode Strips

Low-cost linear chain for MWPC cathode strip charge read out is described. Some simple relations for noise calculation of the preamplifier (which is a fast low-noise current amplifier) are given. Due to space restriction on the detector, hybrid technique for the preamplifier realization is adopted. The problems of transmission of linear signals (60 m) using twisted pairs, are discussed. 0.2 % of cross-talk is achieved. Fast differential input line receiver with shortening filter is used in order to compensate the integration of the transmission line. The cross-talk and the noise pick-up are reduced by assuming a good symmetry and using charge sensing ADC for digitalization of the analog signals.