Design of a 3rd order Delta-Sigma Modulator with a Frequency Detection Circuit

초록

This paper proposes a design of a 3rd order delta-sigma modulator with a frequency detection circuit to process both EEG and EMG signals. The power consumption and FOM can be optimized by selecting one of the two integrators (one for EEG and another for EMG), depending on the frequency of input signals. The simulated performance of the proposed modulator shows 98dB SNDR, 16bit ENOB, and 2.4mW of power dissipation with 1.8V of Supply Voltage at 256 KHz of conversion rate and 1 KHz of input frequency.