Title :
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
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;
Conference_Titel :
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0387-1
DOI :
10.1109/APCCAS.2006.342515
