A Low-Voltage Low-Power Sigma-Delta Modulator for Biomedical Application
نویسنده
چکیده
A low-voltage low-power discrete time sigma delta modulator for biomedical signal acquisition designed and implemented in 0.18-μm CMOS process is presented in this paper. This sigma delta modulator is designed using cascaded 3rd-order feedback form of integrator with the over sampling ratio (OSR) of 32. The experimental prototype chip achieves 55dB and 60dB dynamic range for 200Hz and 500Hz signals respectively. It consumes 20μW power from a 1Volt power supply.
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