An ultra-low power MOS Parametric Integrator-based Feed Forward $\Delta\sum$ Modulator Design for Biomedical devices

This paper deals with a design of an ultra-low-power second order feed forward (FF) delta sigma (ΔΣ) modulator using MOS parametric integrator (MPI) technique for biomedical implant devices. This type of modulator is designed for applications dedicated for the medical implant communication service (MICS) band. It is considered to work at a signal bandwidth of 150 kHz at an oversampling ratio of 50 with a sampling frequency of 15MHz. The designed modulator achieves a good signal to noise ratio (SNR) of 56.4dB and a resolution of 9.02bits. The 2
^nd
FF ΔΣ modulator is implemented using the TSMC 0.18μm CMOS technology and it consumes only 2.5μW.