A low noise preamplifier and switched capacitor filter for heart-rate detection

Author

Basak, D. ; Nishanth, P.V. ; Paily, Roy P.

Author_Institution

Dept. of Electron. & Electr. Eng., Indian Inst. of Technol. Guwahati, Guwahati, India

fYear

2013

fDate

21-23 Sept. 2013

Firstpage

184

Lastpage

188

Abstract

The development of deep-submicron CMOS IC fabrication technologies has brought portable, battery operated devices such as cardiac pacemakers and personal heart rate detectors to the market. This paper presents a 1.8 V analog front-end for heart-rate detector. The front-end includes cascaded preamplifier and filter designed to reduce the device flicker noise at ECG bandwidth. The sensed low amplitude ECG signal from a noisy environment is amplified by the preamplifier. Special feedback mechanism has been employed to increase the SNR against body-electrode source noise. The designed preamplifier is reported to achieve a SFDR (Spurious free dynamic range) of 87.5 dB with a total power consumption of 0.354 mW combined with the filter. The current design is carried out using BSIM3V3.2 model at 0.18 μm UMC process technology.

Keywords

bioelectric potentials; biomedical electrodes; biomedical electronics; electrocardiography; feedback; flicker noise; low noise amplifiers; medical signal detection; medical signal processing; preamplifiers; switched capacitor filters; BSIM3V3.2 model; ECG bandwidt; SFDR; Spurious free dynamic range; UMC process technology; analog front-end; body-electrode source noise; cardiac pacemaker; cascaded preamplifier; deep-submicron CMOS IC fabrication technology; feedback mechanism; flicker noise reduction; low amplitude ECG signal; low noise preamplifier; personal heart rate detector; power 0.354 mW; signal-to-noise ratio; switched capacitor filter; total power consumption; voltage 1.8 V; CMOS integrated circuits; Capacitors; Electrocardiography; Signal to noise ratio; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Electronic Systems (ICAES), 2013 International Conference on

Conference_Location

Pilani

Print_ISBN

978-1-4799-1439-5

Type

conf

DOI

10.1109/ICAES.2013.6659388

Filename

6659388