Title :
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
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 muVrms (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;
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
DOI :
10.1109/SMELEC.2008.4770276
