Ultra-low Power CMOS Front-End Readout ASIC for Portable Digital Radiation Detector  

作　　者：周云波 杨煜 单悦尔 曹华锋 杨兵 于宗光 

机构地区：[1]School of Internet of Things Engineering,Jiangnan University [2]58th Research Institute,China Electronic Technology Group Corporation

出　　处：《Tsinghua Science and Technology》2011年第2期157-163,共7页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No. BK2007026);the 333 High-Level Personnel Training Project of Jiangsu Province (No. 2007124)

摘　　要：An ultra-low power complementary metal-oxide-semiconductor （CMOS） front-end readout ASIC was developed for a portable digital radiation detector. The ASIC having a charge sensitive amplifier and a semi-Gaussian pulse-shaper was produced using the CSMC 0.5 μm DPDM process. The ENC noise of 363 e at 0 pF with a noise slope of 23 e/pF complies with the stringent low noise requirements. The peaking time was 250 ns at a 100 mV/fC conversion gain （detector capacitance is 20 pF）. By operating this frontend readout ASIC in the weak inversion region, the ultra-low power dissipation is only 0.1 mW/channel （3.0 V） Simulations and test results suggest that this design gives lower power consumption than the front-end readout ASICs working in the strong inversion and is appropriate for the portable digital radiation detectors.An ultra-low power complementary metal-oxide-semiconductor （CMOS） front-end readout ASIC was developed for a portable digital radiation detector. The ASIC having a charge sensitive amplifier and a semi-Gaussian pulse-shaper was produced using the CSMC 0.5 μm DPDM process. The ENC noise of 363 e at 0 pF with a noise slope of 23 e/pF complies with the stringent low noise requirements. The peaking time was 250 ns at a 100 mV/fC conversion gain （detector capacitance is 20 pF）. By operating this frontend readout ASIC in the weak inversion region, the ultra-low power dissipation is only 0.1 mW/channel （3.0 V） Simulations and test results suggest that this design gives lower power consumption than the front-end readout ASICs working in the strong inversion and is appropriate for the portable digital radiation detectors.

关 键 词：charge sensitive SHAPER readout circuit weak inversion region nested feedback loop 

分 类 号：TN492[电子电信—微电子学与固体电子学] TL81[核科学技术—核技术及应用]