← 返回 JSSC 论文列表JSSC 2013第1期Other
A1 0k P i x e lC M O SH a l lS e n s o rA r r a yW i t hB a s e l i n e Suppress
一种用于磁免疫检测的CMOS微系统，通过超顺磁材料的磁化动力学降低测量基线，提高信噪比。
Allan deviation floor of 9 nT
CMOS微系统磁免疫检测超顺磁材料霍尔传感器阵列信号采集
▸利用超顺磁材料的磁化动力学降低测量基线
▸集成64x160霍尔传感器阵列与列并行读出电子
▸结合自动归零和嵌套斩波实现低偏移、高效信号采集
Abstract
A CMOS microsystem for detecting micropart icles in
magnetic immunoassays uses the intrinsic dynamics of magneti-
zation in super-paramagnetic materials to reduce measurement
baseline by
compared to conventional me thods, and to
achieve a signal to baseline ratio , with an improvement of
over 50 compared to systems that ignore bead dynamics. The
microsystem integrates a 64 160 Hall-sensor array with column-
parallel readout electronics that combine auto-zeroing and nested
chopping to enable low-