Capacitor array structure and switch control for energy-efficient SAR analog-to-digital converters

This paper presents a new capacitor array structure and its switch control method for binary weighted SAR analog- to-digital converters, which can significantly lower the energy consumed in charge redistribution steps. The proposed method is analyzed theoretically and simulations are performed to verify the theoretical analysis. Simulation results show that the proposed capacitor array structure and switching method can reduce the average energy consumed in the capacitor array by 75% and 60% compared to the conventional method and the splitting capacitor method, respectively.