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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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2009
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| Online Access: | https://hdl.handle.net/10356/19278 |
| _version_ | 1826111791285927936 |
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| author | Song, Pengyu |
| author2 | Yvonne Lam Ying Hung |
| author_facet | Yvonne Lam Ying Hung Song, Pengyu |
| author_sort | Song, Pengyu |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T02:56:37Z |
| format | Thesis |
| id | ntu-10356/19278 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:56:37Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-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 |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits Song, Pengyu Design of delta-sigma modulator for ultrasound imaging |
| title | 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_short | Design of delta-sigma modulator for ultrasound imaging |
| title_sort | design of delta sigma modulator for ultrasound imaging |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits |
| url | https://hdl.handle.net/10356/19278 |
| work_keys_str_mv | AT songpengyu designofdeltasigmamodulatorforultrasoundimaging |