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...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2003
|
Online Access: | http://ndltd.ncl.edu.tw/handle/85913301745678682079 |
id |
ndltd-TW-091CYCU5428054 |
---|---|
record_format |
oai_dc |
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 |
work_keys_str_mv |
AT kangchupeng designandapplicationofcoreiconlowvoltageanalogtodigitalconverter AT pénggāngzhù designandapplicationofcoreiconlowvoltageanalogtodigitalconverter AT kangchupeng dīdiànyālèibǐshùwèizhuǎnhuànqìzhīhéxīndiànlùshèjìyǔyīngyòng AT pénggāngzhù dīdiànyālèibǐshùwèizhuǎnhuànqìzhīhéxīndiànlùshèjìyǔyīngyòng |
_version_ |
1717760980673363968 |