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

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

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 C_det=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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSICT.2014.7021412

Filename

7021412