A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption

A 14-bit Hybrid DAC circuit is created with the goal of being low power yet maintaining high resolution output and high accuracy. In order to achieve this, binary weighted DAC architecture is used for the 10 LSBs and thermometer coding is used for the 4 MSBs to leverage the advantages of both archit...

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Main Author:	Chang, Hui Yi
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TK1-9971 Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.usm.my/38352/1/CHANG_HUI_YI_24_Pages.pdf
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id	my-usm-ep.38352
record_format	uketd_dc
spelling	my-usm-ep.383522020-10-08T03:25:01Z A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption 2017 Chang, Hui Yi TK1-9971 Electrical engineering. Electronics. Nuclear engineering A 14-bit Hybrid DAC circuit is created with the goal of being low power yet maintaining high resolution output and high accuracy. In order to achieve this, binary weighted DAC architecture is used for the 10 LSBs and thermometer coding is used for the 4 MSBs to leverage the advantages of both architectures. Binary Weighted architecture is used due to its simplicity and high linearity but it is too expensive and impractical for higher resolutions. Thermometer coding advantage lie in having very low glitch effect thus improving the monotonicity of the design. Furthermore, this design uses a switchable current source to drive the digital input. The switchable current source is used to manipulate the current gain to ensure a low power design. The design is using predictive technology model (PTM) 45nm 1.1V CMOS technology. It is being simulated using LTSpice software. Simulation Results show a fine resolution step value of 44 μV and a requirement of only 12 μA current supply which results in a very low power consumption of around 23mW. This is superior to all similar works except for binary-weighted current steering DAC which consumes 20mW yet suffers from serious glitch issues. 2017 Thesis http://eprints.usm.my/38352/ http://eprints.usm.my/38352/1/CHANG_HUI_YI_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik dan Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TK1-9971 Electrical engineering Electronics Nuclear engineering
spellingShingle	TK1-9971 Electrical engineering Electronics Nuclear engineering Chang, Hui Yi A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
description	A 14-bit Hybrid DAC circuit is created with the goal of being low power yet maintaining high resolution output and high accuracy. In order to achieve this, binary weighted DAC architecture is used for the 10 LSBs and thermometer coding is used for the 4 MSBs to leverage the advantages of both architectures. Binary Weighted architecture is used due to its simplicity and high linearity but it is too expensive and impractical for higher resolutions. Thermometer coding advantage lie in having very low glitch effect thus improving the monotonicity of the design. Furthermore, this design uses a switchable current source to drive the digital input. The switchable current source is used to manipulate the current gain to ensure a low power design. The design is using predictive technology model (PTM) 45nm 1.1V CMOS technology. It is being simulated using LTSpice software. Simulation Results show a fine resolution step value of 44 μV and a requirement of only 12 μA current supply which results in a very low power consumption of around 23mW. This is superior to all similar works except for binary-weighted current steering DAC which consumes 20mW yet suffers from serious glitch issues.
format	Thesis
qualification_level	Master's degree
author	Chang, Hui Yi
author_facet	Chang, Hui Yi
author_sort	Chang, Hui Yi
title	A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
title_short	A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
title_full	A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
title_fullStr	A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
title_full_unstemmed	A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption
title_sort	14-bit pseudo-differential current-source resistor-string hybrid digital-to-analogue (dac) converter with low power consumption
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik dan Elektronik
publishDate	2017
url	http://eprints.usm.my/38352/1/CHANG_HUI_YI_24_Pages.pdf
_version_	1747820687352922112

A 14-Bit Pseudo-Differential Current-Source Resistor-String Hybrid Digital-To-Analogue (DAC) Converter With Low Power Consumption

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