A 120pW 50Hz notch filter for low-frequency physiological acquisition

Author

Li, Haixi ; Zhang, Jinyong ; Wang, Lei

Author_Institution

Inst. of Biomed. & Health Eng., Shenzhen Univ. Town, Shenzhen, China

fYear

2011

fDate

3-5 Nov. 2011

Firstpage

49

Lastpage

52

Abstract

A CMOS OTA-C notch filter for 50Hz interference was presented in this paper. The OTAs were working in weak inversion region in order to achieve ultra low transconductance and power consumptions. The circuits were designed using SMIC mixed-signal 0.18nm 1P6M process. The post-annotated simulation indicated that an attenuation of 47.2dB for power line interference and a 120pW consumption. The design achieved a dynamic range of 75.8dB and a THD of 0.1%, whilst the input signal was a 1 Hz 20mV_pp sine wave.

Keywords

CMOS analogue integrated circuits; harmonic distortion; interference (signal); notch filters; operational amplifiers; physiological models; power consumption; CMOS OTA-C notch filter; SMIC mixed-signal; attenuation; circuits; frequency 50 Hz; input signal; low-frequency physiological acquisition; noise figure 47.2 dB; noise figure 75.8 dB; post-annotated simulation; power 120 pW; power consumptions; power line interference; sine wave; size 0.18 mum; total harmonic distortion; ultralow transconductance; Band pass filters; Capacitors; Interference; Low pass filters; Power harmonic filters; Resistors; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioelectronics and Bioinformatics (ISBB), 2011 International Symposium on

Conference_Location

Suzhou

Print_ISBN

978-1-4577-0076-7

Type

conf

DOI

10.1109/ISBB.2011.6107642

Filename

6107642