A Micropower CMOS Amplifier for Portable Surface EMG Recording

Author

Chan, P.K. ; Hanasusanto, G.A. ; Tan, H.B. ; Ong, V. K S

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

fYear

2006

fDate

4-7 Dec. 2006

Firstpage

490

Lastpage

493

Abstract

A CMOS biomedical preamplifier for portable skin surface electromyograph (EMG) signal recording is presented. The bioamplifier includes an improved pseudoresistor for realizing a large time constant high-pass filter, an improved differential difference amplifier (DDA) for increasing bandwidth efficiency and a modified MOSFET floating resistor using linearized native NMOS transistors to enable low-pass filter design in reduced supply environment. By incorporating chopper stabilization, an input-referred noise of 2.76 muVrms is attainable for bandwidth of 1.5 kHz. The simulation results are based on BSIM3 models from TSMC 0.25 mum CMOS technology at dual supply of plusmn 1.5V. The proposed EMG amplifier permits fully integration, with a power consumption of 685 muW (without including power of micropower oscillator)

Keywords

CMOS analogue integrated circuits; MOSFET; analogue integrated circuits; differential amplifiers; electromyography; high-pass filters; low-pass filters; medical signal processing; power amplifiers; preamplifiers; resistors; skin; 0.25 micron; 1.5 kHz; 2.76 muV; 685 muW; BSIM3 models; CMOS biomedical preamplifier; CMOS technology; MOSFET floating resistor; NMOS transistors; bioamplifier; chopper stabilization; differential difference amplifier; high-pass filter; input-referred noise; low-pass filter design; micropower CMOS amplifier; micropower oscillator; portable skin surface electromyograph signal recording; pseudoresistor; Bandwidth; CMOS technology; Choppers; Differential amplifiers; Electromyography; Low pass filters; MOSFET circuits; Preamplifiers; Resistors; Skin;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on

Conference_Location

Singapore

Print_ISBN

1-4244-0387-1

Type

conf

DOI

10.1109/APCCAS.2006.342515

Filename

4145438