학술논문
A Low Power Active-Passive Noise Shaping SAR ADC
Document Type
Conference
Author
Source
2023 IEEE 3rd International Conference on Electronic Technology, Communication and Information (ICETCI) Electronic Technology, Communication and Information (ICETCI), 2023 IEEE 3rd International Conference on. :373-377 May, 2023
Subject
Language
Abstract
The traditional passive noise-shaping SAR ADC has low power consumption but weak shaping capability; while the active noise-shaping SAR ADC has strong shaping capability but high-power consumption. The typical active-passive SAR ADC still consumes considerable power due to the use of OTA amplifier in the active part. In this paper, an active-passive noise-shaping SAR ADC is designed by using floating inversion amplifier (FIA) to replace the traditional OTA amplifier in the active part, which achieves a strong noise shaping capability and low power consumption at the same time. The second-order active-passive noise-shaping SAR ADC circuit designed by a 180nm CMOS process achieves 14.6-bit ENOB with 400KS/s sampling rate and consumes only 28.9µW.