Design of detection circuit of EGFET-based pH sensor with high precision

GENG Liang; HUI Ze-ji; ZHANG Xiao-dong; HAN Bao-ru; LIAO Jian-jun

doi:10.13873/j.1000-9787(2018)11-0096-03

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Design of detection circuit of EGFET-based pH sensor with high precision

更新时间：2025-09-11

- Design of detection circuit of EGFET-based pH sensor with high precision
- Vol. 37, Issue 11, Pages: 96-98+102(2018)
- 作者机构：
  
  1. 海南大学热带农林学院
  2. 重庆医科大学医学信息学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-9787(2018)11-0096-03
  CLC： TP212
- Published：2018
- 稿件说明：
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[1]耿亮,惠泽基,张孝冬,韩宝如,廖建军.高精度EGFET pH传感器检测电路设计[J].传感器与微系统,2018,37(11):96-98+102.

GENG Liang, HUI Ze-ji, ZHANG Xiao-dong, et al. Design of detection circuit of EGFET-based pH sensor with high precision[J]. 2018, 37(11): 96-98+102.
[1]耿亮,惠泽基,张孝冬,韩宝如,廖建军.高精度EGFET pH传感器检测电路设计[J].传感器与微系统,2018,37(11):96-98+102. DOI： 10.13873/j.1000-9787(2018)11-0096-03.

GENG Liang, HUI Ze-ji, ZHANG Xiao-dong, et al. Design of detection circuit of EGFET-based pH sensor with high precision[J]. 2018, 37(11): 96-98+102. DOI： 10.13873/j.1000-9787(2018)11-0096-03.

摘要

设计了一种利用延伸栅极型晶体管（EGFET）检测溶液pH值的电路

包括信号采集、信号转换与处理、放大电路设计、模数转换器（ADC）及软件设计部分。实测结果表明:设计的电路在溶液pH值4

0范围内输出电压的灵敏度为39.68 m V/pH。与传统的pH玻璃电极相比

设计的传感器具有响应速度快、易于封装、对光和温度不敏感、稳定性好等特点。

Abstract

A detection circuit of extended-gate field-effect-transistors（EGFET）-based pH senors is designed

including signal acquisition

signal conversion and processing

amplifier circuit design

ADC converter

and software design.The experimental result shows that the sensitivity of output voltage of circuit is 39.68 m V/pH ranging from pH = 4 to pH = 10. Compared with conventional pH glass electrodes

EGFET-based pH sensors have the characteristics of fast response

easy for encapsulation

insensitive to light and temperature

and good stability

and so on.

关键词

Keywords

references

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基于STM32的高精度三电极测试电路研究 [J]. 苑恒,徐军明,胡晓萍. 机电工程 . 2014(02)

酸性环境中基于Ta 2 O 5 的场效应管pH传感器的研究 [J]. 金妍,陈淼,金庆辉,赵建龙. 传感器与微系统 . 2014(01)

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