摘要
设计了一种增益可手动数字设置或程控设置且无调节电位器的宽带直流放大器。该放大器主要以单片机MSP430和继电器组作为电路的主要控制部分,由使用D/A转换器AD5545控制的放大电路、前级信号调理电路、后级功率放大电路和滤波器组成,实现了增益连续可调的功能。该放大器在0～60dB范围内连续可调,输出信号无明显失真,在0～5MHz范围内信号可放大60dB,最大输出电压为8V。
A broadband DC signal amplifier which its gain could be manually set or programmed to set without adjustment potentiometer is designed.MCU MSP 430 and the relay as the circuit＇s main control part which is also include the amplifier circuit controlled by D/A converter AD5545,the first level signal conditioning circuit,power amplifier and filter-class composition,the function of gain continuously adjustable is realized.The amplifier is adjustable in the range of 0 ～ 60dB with the output signal without significant distortion,in the range of 0 ～ 5MHz,the signal could be amplified to 60dB,the maximum output voltage is 8V.
出处
《价值工程》
2011年第3期173-173,共1页
Value Engineering
关键词
宽带放大器
可控增益
信号调理
功率放大器
滤波器
broadband amplifier
gain controlled
signal conditioning
power amplifier
filter
