Design of delta-sigma modulator for ultrasound imaging

The design and implementation of a high speed continuous-time delta-sigma modulator is presented in this report. The modulator is designed for a portable ultrasound digital beamformer to digitize ultrasound signal centered at 3.5MHz with fractional bandwidth of 0.6. A CMOS third-order low-pass modul...

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Main Author: Song, Pengyu
Other Authors: Yvonne Lam Ying Hung
Format: Theses and Dissertations
Language:English
Published: 2009
Subjects:
Online Access:https://hdl.handle.net/10356/19278
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-192782023-07-04T17:02:45Z Design of delta-sigma modulator for ultrasound imaging Song, Pengyu Yvonne Lam Ying Hung School of Electrical and Electronic Engineering Centre for Integrated Circuits and Systems DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits The design and implementation of a high speed continuous-time delta-sigma modulator is presented in this report. The modulator is designed for a portable ultrasound digital beamformer to digitize ultrasound signal centered at 3.5MHz with fractional bandwidth of 0.6. A CMOS third-order low-pass modulator was simulated and implemented at 200MHz sampling frequency. An improved low power transconductor with reduced mobility degradation was designed and realized. With full circuit simulation, the modulator achieves a dynamic range of 59.6dB and consumes only 4.20mW RMS power at 1.8V supply voltage. The layout was implemented using Chartered 0.18μm CMOS process. The core layout occupies 0.073mm2 and the entire die including 24 pads occupies 1.54mm2. Comparing with the existing circuits, the proposed structure dissipates relatively lower power and achieves comparable resolution. MASTER OF ENGINEERING (EEE) 2009-11-16T07:10:12Z 2009-11-16T07:10:12Z 2009 2009 Thesis Song, P. (2009). Design of delta-sigma modulator for ultrasound imaging. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/19278 10.32657/10356/19278 en 152 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Song, Pengyu
Design of delta-sigma modulator for ultrasound imaging
description The design and implementation of a high speed continuous-time delta-sigma modulator is presented in this report. The modulator is designed for a portable ultrasound digital beamformer to digitize ultrasound signal centered at 3.5MHz with fractional bandwidth of 0.6. A CMOS third-order low-pass modulator was simulated and implemented at 200MHz sampling frequency. An improved low power transconductor with reduced mobility degradation was designed and realized. With full circuit simulation, the modulator achieves a dynamic range of 59.6dB and consumes only 4.20mW RMS power at 1.8V supply voltage. The layout was implemented using Chartered 0.18μm CMOS process. The core layout occupies 0.073mm2 and the entire die including 24 pads occupies 1.54mm2. Comparing with the existing circuits, the proposed structure dissipates relatively lower power and achieves comparable resolution.
author2 Yvonne Lam Ying Hung
author_facet Yvonne Lam Ying Hung
Song, Pengyu
format Theses and Dissertations
author Song, Pengyu
author_sort Song, Pengyu
title Design of delta-sigma modulator for ultrasound imaging
title_short Design of delta-sigma modulator for ultrasound imaging
title_full Design of delta-sigma modulator for ultrasound imaging
title_fullStr Design of delta-sigma modulator for ultrasound imaging
title_full_unstemmed Design of delta-sigma modulator for ultrasound imaging
title_sort design of delta-sigma modulator for ultrasound imaging
publishDate 2009
url https://hdl.handle.net/10356/19278
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