Analog to Digital Converter using Delta Sigma loop for the application portable ECG Device

We designed and simulating delta sigma ADC for the ECG signal processing in order to achieve high signal to quantization noise ratio by using over sampling concept and low resolution ADC and DAC. The Proposed work will contain system level modeling, simulation and implementation of blocks used in delta sigma ADC. It is compared with ideal blocks done in simulation. The system level design of third order feedforward (CIFF) structure of continuous time delta sigma modulator is proposed employed in ADC in order to reduce power consumption. The efficiency of the proposed ADC is measured in terms of noise spectrum, maximum stable input amplitude range, simulation performance and accuracy. The targeted signal to noise ratio (SNR) is more than 90 dB with resolution more than 12 bit.