Title :
Non-amplifying ECG signal acquisition system based on Σ-Δ A/D
Author :
Liang, Hu ; Yanfang, Zhang ; Lesheng, He ; Weilian, Wang
Author_Institution :
Sch. of Inf. Sci. & Technol., Yunnan Univ., Kunming, China
Abstract :
ECG signal is a very weak signal acquired on the surface of body. In traditional ECG signal acquisition system, to get a high-SNR ECG signal, it must use all kinds of high-performance op-amp, which leads to the acquiring circuits complex and unstable. Furthermore, almost all op-amps more or less have nonlinear distortion and other disadvantages. In this paper, a non-amplifying method to acquire a high-SNR ECG signal was proposed. It is based on 24 bit Σ-Δ A/D embedded in a high performance mixture signal ARM processor-ADuC7060. The system has high SNR up to 74.8 dB, and low nonlinear distortion, original ECG can be acquired.
Keywords :
electrocardiography; medical signal detection; operational amplifiers; ARM processor-ADuC7060; body surface; high performance op-amp; nonamplifying ECG signal acquisition system; Digital filters; Electrocardiography; Instruments; Low pass filters; Nonlinear distortion; Signal to noise ratio; Σ-Δ A/D; Non-Amplifying ECG acquisition; high-SNR; low nonlinear distortion;
Conference_Titel :
Electronic Measurement & Instruments (ICEMI), 2011 10th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-8158-3
DOI :
10.1109/ICEMI.2011.6037865
