摘要
提出了一种采用数控方式的高增益、宽带宽放大器。采用多个放大器直接耦合级联的方式,有效改善了放大器的低频特性,提高了放大增益范围;数控增益自动稳定技术,有效带宽内提高了增益稳定性;多个放大器增益统一控制电压,降低了增益控制难度,使控制电压与放大增益成线性关系,有利于数控调节增益变化;AVR单片机作为数控单元,键盘输入预置、调节增益,液晶显示,使放大器的操作简单快捷;数控联动开关技术,设计了两级或三级放大的切换功能,使放大器的应用更加灵活。
This paper proposes a high gain and wide bandwidth amplifiers with numerical approach. It is improved that the low-frequency characteristics and the range of gain refers to direct-coupling. The gain is controlled with numerical approach,which makes the gain stability. It is easy to control the gain of the multistage amplifier with adopting uniform gain control voltage. It is useful for numerical approach because of the linear between ontrol voltage and the gain. AVR microcontroller is the heart of numerical unit. The gain is been preset and adjusted through keyboard. Most of index can be showed through LCD. NC linkage switching technology is used to switch between two or three multistage amplifier,it is useful to enabling a more flexible application of the amplifier.
出处
《长春理工大学学报（自然科学版）》
2010年第1期82-84,13,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
增益数控调节
增益自动控制
多级放大
直接耦合
adjustment of gain with numeric control
auto control of gain
multistage amplifier
direct-coupling
