Title :
A capacitor sharing technique for RSD cyclic ADC
Author :
Soufi, Basem ; Malik, Saqib Q. ; Geiger, Randall L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA
Abstract :
A new cyclic ADC structure based on capacitor sharing is presented. This technique reduces the die area of the capacitors in the switched capacitor network by up to 50%. As a result, the proposed scheme also significantly reduces the power consumption requirement of the operational amplifier. This is achieved while maintaining the thermal noise performance and conversion rate of the conventional structure. A 10-bit, 2.3MHz cyclic ADC using the new structure is implemented in 0.5 mum CMOS. Spectre simulation results of the new structure are presented
Keywords :
CMOS integrated circuits; analogue-digital conversion; circuit simulation; operational amplifiers; power consumption; switched capacitor networks; thermal noise; 0.5 micron; 2.3 MHz; ADC; CMOS; RSD cyclic; capacitor sharing; conversion rate; operational amplifier; power consumption; spectre simulation; switched capacitor network; thermal noise performance; Analog-digital conversion; Batteries; Computational modeling; Energy consumption; Operational amplifiers; Portable computers; Power amplifiers; Sampling methods; Switched capacitor networks; Voltage;
Conference_Titel :
Circuits and Systems, 2005. 48th Midwest Symposium on
Conference_Location :
Covington, KY
Print_ISBN :
0-7803-9197-7
DOI :
10.1109/MWSCAS.2005.1594237
