Design of Microelectronic System Based on Front-end Readout Circuit

Abstract

Based on the digital filtering technology of the frontend readout microelectronic system and its filter module, a frontend readout microcircuit system chip is designed to reduce the noise of the readout circuit, so as to improve the signal recognition efficiency of the detection system. Through to the front end to delve into detector system, based on the front end of the nuclear radiation detector and the front end of the readout circuit theory, this study adopts the Taiwan electrical and mechanical company TSMC 0.18 $\mu m$ complementary metal oxide semiconductor (CMOS) process, designed a read analog frontend chip and testing its performance, including chip function and noise performance. The function test of the front-end circuit readout chip designed in this paper proves that the chip is qualified and its input range is $0.5 \sim 7$ fC and the noise equivalent charge is 109$e^{-}+ 17.9e^{-}$/pF. According to the conversion efficiency of the CdZnTe compound material detector, the detector can handle the equivalent energy within the range of $18 \sim 205$ keV. The linearity of SK filter decreases with the increase of signal, and the overall nonlinearity is less than 4%.Based on digital filter, the front-end readout circuit chip of radiation detection can meet the requirements of detection performance index, reduce the noise of the readout circuit, and improve the signal recognition efficiency of the detection system.