Title :
Differential difference amplifier FGMOS for electrocardiogram signal acquisition
Author :
Mejía-Chávez, Patricia ; Sánchez-García, Juan C. ; Velázquez-López, José
Author_Institution :
Dept. of Grad. Studies & Res., ESIME Culhuacan-IPN, Mexico City, Mexico
Abstract :
In this paper a CMOS Instrumentation Amplifier (IA) for Electrocardiogram (ECG) acquisition systems is presented. This IA, configured as Differential Difference Amplifier (DDA), achieves high Common Mode Rejection Ratio (CMRR), high input impedance and low dc output voltage which are essential attributes for this building block. Besides, an innovative technique in CMOS analog design named Floating Gate (FG) is applied in the DDA designed to reduce offset. The presented IA is implemented in standard 0.5μm CMOS process working with α1.5V power supply. The dc offset voltage is reduced to 39μV, differential gain obtained is 39dB, CMRR reaches 136dB@10Hz and the input referred noise obtained is 3.7μV/√Hz.
Keywords :
CMOS analogue integrated circuits; electrocardiography; instrumentation amplifiers; logic gates; signal detection; CMOS analog design; CMOS instrumentation amplifier; CMOS process; FGMOS; common mode rejection ratio; differential difference amplifier; electrocardiogram signal acquisition; floating gate; frequency 10 Hz; gain 39 dB; size 0.5 mum; CMOS integrated circuits; Electrocardiography; Electroencephalography; Impedance; Instruments; Mirrors; Transistors; CMRR; DDA; ECG; Floating Gate; IA; dc offset;
Conference_Titel :
Electrical Engineering Computing Science and Automatic Control (CCE), 2011 8th International Conference on
Conference_Location :
Merida City
Print_ISBN :
978-1-4577-1011-7
DOI :
10.1109/ICEEE.2011.6106684
