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

fYear

2005

fDate

7-10 Aug. 2005

Firstpage

859

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. 48th Midwest Symposium on

Conference_Location

Covington, KY

Print_ISBN

0-7803-9197-7

Type

conf

DOI

10.1109/MWSCAS.2005.1594237

Filename

1594237