CMOS Readout System for a Double-sided Germanium Strip Detector
نویسندگان
چکیده
A wide variety of applications require a hard Xray or gamma ray detector which combine both good spatial resolution and energy resolution. Double-sided solid-state strip detectors provide this capability. We report on the development of CMOS electronics designed for photon detection with strip detectors. These electronics include a low noise preamplifier, semi-gaussian shaping amplifier, discriminator, and peak detection circuitry. All circuits are designed to operate at low power. Circuits have been duplicated in both NMOS and PMOS to provide both polarities of signals. We have constructed an 8×8 channel system to test these prototype chips. Power consumption for the preamplifier through peak-detector circuit is 4 mW/channel. The test system has a conversion gain of ~35 mV/fC, system noise (equivalent noise charge) of ENC<220 e rms (0 pF), and a dynamic range of >100:1 in both NMOS and
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