摘要
基于改变电阻来控制放大器的增益。采用X9241系列数字电位器,辅以AT89S52单片机进行控制,增益的调整和控制是通过选择数字电位器中不同阻值的电位器以及软件的进一步修正来达到的,较好地实现了可控增益放大器,可应用于数据采集系统的信号调理或要求放大器增益可程控等场合。
Changing resistance can control amplifier＇s gain. In the experiment, using X9241 digital potentiometer and AT89S52 single chip. In order to modulate and control amplifier＇s gain, selecting potentiometer which has different resistance values and using software to modify. This method can carry out gain - controllable amplifier preferably, which can be applied in signal regulation of data - collecting system and some situation which amplifier＇s gain is controlled.
出处
《现代电子技术》
2008年第23期160-162,共3页
Modern Electronics Technique
基金
山西省教育教学改革项目"实验教学实施体系的构建与管理"(A0401)
关键词
放大器
数字电位器
可控增益放大器
单片机
amplifier
digital potentiometer
gain - controllable amplifier
single chip computer
