Design and Application of Core IC on Low Voltage Analog-to-Digital Converter

碩士 === 中原大學 === 電子工程研究所 === 91 === ABSTRACT   Due to a variety of battery-operated or portable device applications such as digital camera, pressure sensor, ISFET-based pH meter, etc., CMOS compatible sensor technology becomes more attractive in recent year. However, the circuitry of low-voltage sig...

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Main Authors: Kang-Chu Peng, 彭罡竚
Other Authors: Wen-Yaw Chung
Format: Others
Language:zh-TW
Published: 2003
Online Access:http://ndltd.ncl.edu.tw/handle/85913301745678682079
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spelling ndltd-TW-091CYCU54280542015-10-13T15:01:29Z http://ndltd.ncl.edu.tw/handle/85913301745678682079 Design and Application of Core IC on Low Voltage Analog-to-Digital Converter 低電壓類比數位轉換器之核心電路設計與應用 Kang-Chu Peng 彭罡竚 碩士 中原大學 電子工程研究所 91 ABSTRACT   Due to a variety of battery-operated or portable device applications such as digital camera, pressure sensor, ISFET-based pH meter, etc., CMOS compatible sensor technology becomes more attractive in recent year. However, the circuitry of low-voltage signal processing in update CMOS technology for ISFET-based applications has not yet been developed and published. Therefore, to develop the low-voltage core modules on micro-sensor system related research become more valuable and important.   The major objective of this thesis is to discuss the core integrated circuit on low-voltage analog-to-digital converter for battery-operated applications. Two-step A/D converter is presented in this research. It is supported with microcomputer compatible interface. The resolution of the A/D is 8-bit and operated at 1.5V. Key block diagram of this A/D converter consist resistor string, capacitor array, comparator, encoder, analog multiplexer and latch bank, which has been fabricated in UMC 0.5μm double-poly double-metal CMOS technology. The measured results show that the ADC consumes 300μW only, the INL and DNL are –1~+2LSB and -3~0 respectively.   In addition, the mentioned two-step ADC above was integrated with a previous developed 1.5V bulk-driven pre-amplifier for H+ sensing applications. The experimental results show that the proposed circuitry has an acceptable linearity to 0.1pH accuracy with the buffer solution in the range of pH2 to pH12. Keyword: ISFET, low-voltage, analog-to-digital converter, pH Wen-Yaw Chung 鍾文耀 2003 學位論文 ; thesis 54 zh-TW
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 碩士 === 中原大學 === 電子工程研究所 === 91 === ABSTRACT   Due to a variety of battery-operated or portable device applications such as digital camera, pressure sensor, ISFET-based pH meter, etc., CMOS compatible sensor technology becomes more attractive in recent year. However, the circuitry of low-voltage signal processing in update CMOS technology for ISFET-based applications has not yet been developed and published. Therefore, to develop the low-voltage core modules on micro-sensor system related research become more valuable and important.   The major objective of this thesis is to discuss the core integrated circuit on low-voltage analog-to-digital converter for battery-operated applications. Two-step A/D converter is presented in this research. It is supported with microcomputer compatible interface. The resolution of the A/D is 8-bit and operated at 1.5V. Key block diagram of this A/D converter consist resistor string, capacitor array, comparator, encoder, analog multiplexer and latch bank, which has been fabricated in UMC 0.5μm double-poly double-metal CMOS technology. The measured results show that the ADC consumes 300μW only, the INL and DNL are –1~+2LSB and -3~0 respectively.   In addition, the mentioned two-step ADC above was integrated with a previous developed 1.5V bulk-driven pre-amplifier for H+ sensing applications. The experimental results show that the proposed circuitry has an acceptable linearity to 0.1pH accuracy with the buffer solution in the range of pH2 to pH12. Keyword: ISFET, low-voltage, analog-to-digital converter, pH
author2 Wen-Yaw Chung
author_facet Wen-Yaw Chung
Kang-Chu Peng
彭罡竚
author Kang-Chu Peng
彭罡竚
spellingShingle Kang-Chu Peng
彭罡竚
Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
author_sort Kang-Chu Peng
title Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
title_short Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
title_full Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
title_fullStr Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
title_full_unstemmed Design and Application of Core IC on Low Voltage Analog-to-Digital Converter
title_sort design and application of core ic on low voltage analog-to-digital converter
publishDate 2003
url http://ndltd.ncl.edu.tw/handle/85913301745678682079
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