Title :
Design of a High-Precision Low-Pass Switched-Capacitor Filter
Author :
Zhu-ping, Wang ; Shun-an, Zhong ; Xiao-qing, Wang ; Dan-dan, Nie
Author_Institution :
Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China
Abstract :
A novel high-precision low-pass switched-capacitor filter was designed for a micro-sensor signal processing system. Different kinds of switches, correlated double sampling technique and high gain operational amplifier were used to decrease output dc gain error and dc offset of switched-capacitor filter, which come from the nonidealities of switch and operational amplifier. Simulation results show that the dc gain error of switched -capacitor filter is approximately 0.0021dB and the dc offset is decreased from 2mV to 23uV.
Keywords :
capacitor switching; low-pass filters; microsensors; operational amplifiers; signal sampling; correlated double sampling technique; low-pass filter; microsensor; operational amplifier; signal processing; switches; switching capacitor; Active filters; Capacitance; Clocks; Gain; Information filters; Switches; Correlated double sampling; Offset; Switched-capacitor filter; operational amplifier;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.180
