Title :
Non-ideal amplifier effects on the accuracy of analog-to-digital capacitor ratio converter
Author :
Choi, Wooyoung ; Harjani, Ramesh ; Vinnakota, B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
The performance of switched capacitor based successive approximation data converters is limited by the matching of capacitor ratios. In previous work we have shown that switched capacitor ratios can be precisely measured using an AD-CRC. In this paper, we analyze and simulate the impact of the non-ideal amplifier behavior on the accuracy of the measured capacitor ratio. We derive closed form equations which describe time-domain relation between the specifications of the amplifier and the accuracy requirements. These relations are used to derive an optimal set of specifications for the amplifier in the AD-CRC
Keywords :
analogue-digital conversion; switched capacitor networks; analog-to-digital capacitor ratio converter; nonideal amplifier; switched capacitor successive approximation data converter; Analog-digital conversion; Analytical models; Bandwidth; Clocks; Cyclic redundancy check; Delta-sigma modulation; Equations; Switched capacitor circuits; Switching converters; Time domain analysis;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921915
