A charge sensitive preamplifier (CSP) followed by an amplifier with pulse shaping networks (PSA) of single differentiation‐single integration type (SDSI), designed to be used with uncooled silicon nuclear particle detectors aboard space vehicles, is described. Noise performance at 5 &mgr;sec SDSI time constant was measured to be 0.91 keV FWHMSiwith a slope of 43 eV/pF. The total power drain is 42 mW at + 12 V supply. The amplifier is stabilized against supply voltage and temperature variations.