Title :
The design of 1MCPS CMOS analog front-end circuit for radiation detector
Author :
Huabing Zhu ; Yacong Zhang ; Jie Liang ; Luya Zhang ; Xiaoliang Li ; Wengao Lu ; Zhongjian Chen
Author_Institution :
Shenzhen Grad. Sch., Sch. of Electron. & Comput. Eng., Peking Univ., Shenzhen, China
Abstract :
This paper presents a design of high counting rate analog front-end circuit for radiation detector in 0.18μm CMOS process. The front-end circuit consists of charge sensitive amplifier (CSA), CR- (RC)n Semi-Gaussian (S-G) filter (called Shaper) which consists of one CR differentiator stage and n order RC integrator stages, and baseline restorer structure (BLR). A 3-rd order filter is selected in order to achieve high counting rate. A new BLR structure is proposed to solve the baseline drift problem caused by process mismatch. The designed front-end circuit achieves at least 1Mcps counting rate. Equivalent Noise Charge (ENC) of it is equal to 750e- for the detector capacitance Cdet=5pF.
Keywords :
CMOS integrated circuits; amplifiers; filters; integrated circuit noise; particle detectors; 3rd order filter; BLR; CMOS process; CR differentiator stage; CR-(RC)n semiGaussian filter; CSA; ENC; S-G filter; baseline restorer structure; capacitance 5 pF; charge sensitive amplifier; equivalent noise charge; high counting rate CMOS analog front-end circuit; n order RC integrator stage; radiation detector; shaper; Abstracts; Educational institutions; Radio frequency;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-3296-2
DOI :
10.1109/ICSICT.2014.7021412
