| 应用于电流激励传感器的高稳定恒流源设计 |
| |
| 引用本文： | 应之璇,曹建安.应用于电流激励传感器的高稳定恒流源设计[J].电测与仪表,2019,56(1):136-140. |
| |
| 作者姓名： | 应之璇 曹建安 |
| |
| 作者单位： | 西安交通大学,西安,710049;西安交通大学,西安,710049 |
| |
| 摘 要： | 针对现有恒流源设计由于低端输出、稳压芯片偏置电流影响恒流输出准确度的问题,文中给出了一种高端输出的高稳定度直流恒流源的设计,解决了采用比例法实现数据采集的基准源问题。采用通用性高端输出的电源稳压芯片,实现基本的稳压功能;应用JFET集成运算放大器消除稳压芯片的偏置电流,提高输出电流的稳定性;通过大范围恒流测试和温度实验表明:所设计实现的恒流源具有4. 73 m A±66. 8 nA高稳定的输出特性。
|
| 关 键 词： | 高端输出恒流源 稳定性 比例法数据采集 |
| 收稿时间： | 2018/5/10 0:00:00 |
| 修稿时间： | 2018/6/28 0:00:00 |
Highly stable constant current source design for current-driven sensors |
| |
| Affiliation: | Xi''an Jiaotong University,Xi''an Jiaotong University |
| |
| Abstract: | In view of the situation that the bias current of voltage regulation, this article delivers a high-stable direct constant- current source, which can be used as the base of data collection by proportion. This article uses a general voltage regulation, eliminating the bias current by JFET operation amplifier, to eventually improve the stability of the output current. As the result of experiment, the circuit designed in this article has the character of high-stable output of 4.73mA±66.8nA. |
| |
| Keywords: | constant-current source stability proportional data acquisition |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《电测与仪表》浏览原始摘要信息 |
|
点击此处可从《电测与仪表》下载全文 |
|
