Author/Authors :
ZHOU, Yunbo Jiangnan University - School of Internet of Things Engineering, China , YANG, Yu Jiangnan University - School of Internet of Things Engineering, China , SHAN, Yueer Jiangnan University - School of Internet of Things Engineering, China , SHAN, Yueer China Electronic Technology Group Corporation - 58th Research Institute, China , CAO, Huafeng Jiangnan University - School of Internet of Things Engineering, China , YANG, Bing China Electronic Technology Group Corporation - 58th Research Institute, China , YANG, Bing Jiangnan University - School of Internet of Things Engineering, China , YU, Zongguang Jiangnan University - School of Internet of Things Engineering, China , YU, Zongguang China Electronic Technology Group Corporation - 58th Research Institute, China
Abstract :
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.
Keywords :
charge sensitive , shaper , readout circuit , weak inversion region , nested feedback loop
