摘要
叙述了大动态弱信号测量的实现方法。程控放大器由低噪声电流反馈运算放大器构成，扩展了测量的频带。通过计算机对接收机增益进行智能化控制，既避免了放大器饱和，又使得采样的量化误差最小。由软件控制选择滤波器，这样可以在很宽的频带获得低噪声的信号。
A technique for implementation of large dynamic range weak signal measurement is described. The use of low-noise current-feedback operational amplifier expands the bandwidth of meaurement. The smart gam-con- trol of the receiver not only avoids the amplifier saturation,but also minimizes the discrete error. The selection of filter is controlled by software,so that low-noise signal can be acquired in a wide frequency band.
出处
《微电子学》
CAS
CSCD
北大核心
2000年第4期254-257,共4页
Microelectronics
关键词
弱信号测量
程控放大器
电流反馈运算放大器
Weak signal measurement
Programmable amplifier
Current-feedback operational amplifie
