Title :
An ECG measurement IC using driven-right-leg circuit
Author :
Wong, Alex ; Pun, Kong-Pang ; Zhang, Yuan-ting ; Choy, Chiu-Sing
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin
Abstract :
In this paper, an electrocardiographic (ECG) signal processing IC, which is used for portable biomedical application, was designed using continuous-time technique. The circuit consists of an instrumentation amplifier (INA) with driven-right-leg circuit (DRL), a 5th order Gm -C low pass filter (Gm-C LPF) operating in sub-threshold mode, and amplifiers. DRL circuit is used to detect small amplitude signal in the presence of large common-mode voltage from the human body. The CMRR of the INA is 78 dB and the Gm-C LPF has a cutoff frequency of 18 Hz. As a result of using the DRL, a small signal can be detected in the presence of large common-mode differential. The circuit consumes 1.23 mW when operating from with a supply voltage of plusmn1.5-V and occupies a core area of 0.94 mm2. The circuit was designed in a 0.35mum CMOS process and simulation results have successfully demonstrated the functionalities
Keywords :
CMOS integrated circuits; continuous time systems; data acquisition; electrocardiography; integrated circuit design; low-pass filters; medical signal processing; portable instruments; 0.35 micron; 1.23 mW; 1.5 V; 18 Hz; CMOS process; ECG measurement; continuous-time technique; driven-right-leg circuit; electrocardiographic signal processing; instrumentation amplifier; low pass filter; portable biomedical application; signal processing integrated circuit; Application specific integrated circuits; Biomedical measurements; Biomedical signal processing; Electrocardiography; Humans; Instruments; Low pass filters; Signal design; Signal detection; Voltage;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692593
