Title:
An Audio-Band Discrete-Time ΔΣ ADC Using Ring-amp and KT/C Noise Cancellation in 45nm CMOS
An Audio-Band Discrete-Time ΔΣ ADC Using Ring-amp and KT/C Noise Cancellation in 45nm CMOS
Author(s)
Yao, Huang
Advisor(s)
Li, Shaolan
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Abstract
In this thesis, we designed an audio-band DT ΔΣ ADC using ring amplifiers and kT/C noise cancellation. The ADC is designed and simulated in NCSU 45nm CMOS with a 1.2V supply. It achieves a peak SNDR and DR of 100dB and 105dB with a 2mW power
consumption, yielding a Schreier Figure of Merit (FoM) of 171.dB and a Walden FoM of 482fJ/step. We show that a ring amplifier is a good candidate for low-voltage DT circuits
such as an SC integrator, and the kT/C noise cancellation technique can provide a better noise performance in a ΔΣ ADC. In the future, we would optimize the amplifier to improve
the noise performance further and to have lower power consumption
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Date Issued
2023-12-18
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Thesis