Performance Evaluation of Differential Bio-potential Amplifier

© 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 1049 PERFORMANCE EVALUATION OF DIFFERENTIAL BIO-POTENTIAL AMPLIFIER Prerna Mittal1, Padma Batra2 1M-Tech Degree in Electronics and Communication, Krishna Institute of Engineering and Technology, Ghaziabad, UPTU, India 2 Associate Professor, EC Department, Krishna Institute of Engineering and Technology, Ghaziabad, UPTU, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract-Differential Bio-potential Amplifier is used to measuring the bio-impedance of the living things, like human body. The value of bio-impedance of body is very low on scale. To enhance it in a readable for this amplifier is used. It increases the value tobio-impedance up to very high on a scale. So measurement of bio-impedance correctly is a difficult task. It requires very precision circuitry to calculate it and enhance it. The performance of existing current driving circuits was also analyzed. Measured data showed that they failed to achieve desired specifications as one or the other parameters did not matched according to requirement. This was due to different component gain achievement .Most of these limitations might be reduced as has been done in this research. In applications where highly précised amplifier with high input impedance and CMRR is required, this proposed circuit can be used. In this research work, we have explained that how the performance parameters and correct choice of components required to meet the high input impedance and CMRR of a circuit. An approach of using TLV2474 op-amp in place of conventionally usedop-amp. In proposed circuit has been shown to have better performance than all other input impedance & CMRR used in past research works. A complete circuit analysis for input impedance and CMRR is performed using MULTISIM software developed by national instruments under wide range of components different-different values.