On The Design of Low Power CMOS (SA-ADCs) for Biomedical Applications

This book presents three different CMOS realizations of an 8-bit successive approximation analog-to-digital converter (SA-ADC) for biomedical applications. The architecture of the proposed SA-ADCs consist of a sample and hold, a comparator, a successive approximation register (SAR) controller, and an 8-bit digital-to-analog converter. Each building block of the SA-ADC has been reviewed with different architectures in a unique chapter including the simulation results for each architecture for different frequency applications. The proposed SA-ADCs are presented, compared and simulated using 90nm CMOS technology file on LT-spice-IV. In each realization, the SAR controller is implemented using D-flip flop or hybrid latch-flip flop. The best proposed SA-ADC realization has been obtained from the different proposed realizations. According to the simulation results, the best proposed SA-ADC consumes 200nW from 1V power supply and 88.76 nW from 0.85V supply voltage without additional analog circuits. Layout and post layout have been extracted with a real recorded EEG signal for the best proposed SA-ADC. Static and Dynamic performance matrices were obtained for the proposed SA-ADCs.

Autorentext

Tasnim B. Nazzal was born in Dubai, UAE, in 1990. She received the Bachelor degree inElectrical Engineering from Ajman University of Science and Technology, and the Master degreein Electrical and Electronic Engineering from University of Sharjah, UAE, in 2012 and 2016respectively. She is one of the IEEE members.