精密高速模拟电压开关电路的设计  

Design of Precision and High-speed Analog Voltage Switch Circuit

作　　者：李兴宁[1] 陈海燕[1] 王书杰[1] 

机构地区：[1]泰州职业技术学院,江苏泰州225300

出　　处：《无线电工程》2007年第5期59-61,共3页Radio Engineering

摘　　要：设计了一种新型模拟电压可切换无触点开关电路。该电路由集成运算放大器和场效应管组成,能有效地消除场效应管的导通电阻和夹断漏电流造成的不利影响,保证开关的精度、稳定度和高速度,并具有可调节的信号放大能力,功能比较接近理想开关。具体分析了开关电路消除导通电阻、减小关断漏电流、提高开关速度的原理。该开关已在实际应用中获得了满意的效果。A new analog voltage contact-less switch circuit is designed. Consisting of operational amplifier and field effect transistor, the switch can reduce the influence caused by field effect transistor＇s switch-on resistance and leakage current. It is an ideal switch for possessing high accuracy, stability and speed;it also has a adjustable amplifying ability. The principle of eliminating switch-on resistance, reducing switch- off leakage current and enhancing switehover speed is analyzed. This switch has had satisfactory results in practical application.

关 键 词：开关 漏电流 导通电阻 运算放大器 

分 类 号：TN7[电子电信—电路与系统]