A CMOS instrumentation amplifier with low voltage and low noise for portable ECG monitoring systems

Author

Nanda, Chinmayee ; Mukhopadhyay, J. ; Mandal, Debashis ; Chakrabarti, S.

Author_Institution

G S Sanyal Sch. of Telecommun., Indian Inst. of Technol., Kharagpur

fYear

2008

fDate

25-27 Nov. 2008

Firstpage

54

Lastpage

58

Abstract

A low voltage, low noise instrumentation amplifier (IA) applicable for Electrocardiogram signal acquisition system has been designed. The circuit is based on the current feedback topology which has been implemented using folded cascode structure at the input stage. It works at zero input common mode voltage with 1V supply. It has a wide input dynamic range of plusmn0.01 mV to plusmn1.2 mV. The voltage gain is 45 dB and it consumes 165 muW power. A high common mode rejection ratio (CMRR) of 125 dB has been achieved. The integrated input referred noise is 3 muV_rms (0.2Hz - 150 Hz). The design has been done in 0.18 mum standard CMOS process.

Keywords

CMOS integrated circuits; amplifiers; CMOS; common mode rejection ratio; current feedback topology; folded cascode structure; instrumentation amplifier; low noise; low voltage; size 0.18 mum; voltage 1 V; Circuit noise; Circuit topology; Dynamic range; Electrocardiography; Feedback circuits; Instruments; Low voltage; Low-noise amplifiers; Monitoring; Signal design;

fLanguage

English

Publisher

ieee

Conference_Titel

Semiconductor Electronics, 2008. ICSE 2008. IEEE International Conference on

Conference_Location

Johor Bahru

Print_ISBN

978-1-4244-3873-0

Electronic_ISBN

978-1-4244-2561-7

Type

conf

DOI

10.1109/SMELEC.2008.4770276

Filename

4770276