A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method
碩士 === 國立清華大學 === 電機工程學系所 === 105 === Abstract As the communication system advances, the data of the digital transmission is growing rapidly.Therefore, the data converter plays the important role in the recent years. Also, high speed, high bandwidth and dynamic range are the future trend. The topi...
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ndltd-TW-105NTHU54410182019-05-15T23:53:46Z http://ndltd.ncl.edu.tw/handle/543dv6 A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method 具前景式校正機制之10位元1GHz 電流引導式數位類比轉換器 Wei, Li-Fan 魏立帆 碩士 國立清華大學 電機工程學系所 105 Abstract As the communication system advances, the data of the digital transmission is growing rapidly.Therefore, the data converter plays the important role in the recent years. Also, high speed, high bandwidth and dynamic range are the future trend. The topic of the thesis is implementing the digital to analog converter in the high speed and high bandwidth requirements. For high speed operation, the work employ the current steering data converter which the limit of the speed depends on the time constant, and is convenient in high speed application. However the mismatch between the current sources rigidly influence the static and dynamic performance for the data converter. Except for using bigger size of the device, we use the calibration for the current source instead. Before the operation for DAC, we can adjust the current for the current source one to one in the foreground calibration method which can save the area and also achieve the high accuracy. In the implementation of the chip, my work employ the 10bit D/A converter in 65nm. The power supply is 2.5V and the differential output’s Vpp is 0.8V. The chip can split in two parts: the D/A converter, the delta sigma ADC. The D/A converter is built by the current steering DAC, and the delta sigma ADC which is used to sample the difference between current source implements in the first order discrete time delta sigma modulator. After the calibration, SFDR can be improved from 58dB to 79dB in Fin=50M, Fs=1GS/s. Chu, Ta-Shun 朱大舜 2017 學位論文 ; thesis 73 zh-TW |
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碩士 === 國立清華大學 === 電機工程學系所 === 105 === Abstract
As the communication system advances, the data of the digital transmission is growing rapidly.Therefore, the data converter plays the important role in the recent years. Also, high speed, high bandwidth and dynamic range are the future trend.
The topic of the thesis is implementing the digital to analog converter in the high speed and high bandwidth requirements. For high speed operation, the work employ the current steering data converter which the limit of the speed depends on the time constant, and is convenient in high speed application. However the mismatch between the current sources rigidly influence the static and dynamic performance for the data converter. Except for using bigger size of the device, we use the calibration for the current source instead. Before the operation for DAC, we can adjust the current for the current source one to one in the foreground calibration method which can save the area and also achieve the high accuracy.
In the implementation of the chip, my work employ the 10bit D/A converter in 65nm. The power supply is 2.5V and the differential output’s Vpp is 0.8V. The chip can split in two parts: the D/A converter, the delta sigma ADC. The D/A converter is built by the current steering DAC, and the delta sigma ADC which is used to sample the difference between current source implements in
the first order discrete time delta sigma modulator. After the calibration, SFDR can be improved from 58dB to 79dB in Fin=50M, Fs=1GS/s.
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author2 |
Chu, Ta-Shun |
author_facet |
Chu, Ta-Shun Wei, Li-Fan 魏立帆 |
author |
Wei, Li-Fan 魏立帆 |
spellingShingle |
Wei, Li-Fan 魏立帆 A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
author_sort |
Wei, Li-Fan |
title |
A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
title_short |
A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
title_full |
A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
title_fullStr |
A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
title_full_unstemmed |
A 10-Bit 1-GS/s Current-Steering DAC with Foreground Calibration Method |
title_sort |
10-bit 1-gs/s current-steering dac with foreground calibration method |
publishDate |
2017 |
url |
http://ndltd.ncl.edu.tw/handle/543dv6 |
work_keys_str_mv |
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