摘要
介绍宽带高频放大器SA5204A的基于多反馈环路设计的工作原理,结合宽带高频功率放大器的特点,从“S”参数最大/最小限制定义功率增益,分析通常在信号源阻抗或负载阻抗与高频放大器网络匹配情况下的增益特性和影响功耗的基本因素。使用推荐的参数得到很好的频率响应特性和噪声抑制。实验证明,在正常工作状态下,验证其宽带高频放大功能的正确性和实用性。
The paper mainly discusses the theory of operation of wideband high - frequency amplifier SA5204A based on the design of multiple feedback loops,with the characteristics of that wideband high -frequency amplifier, and the ＂S＂ parameter max/min limits define its power gain, and analyses the amplifier＇s gain characteristics on condition that impedance Of signal sources or loads matching with its networks in the actual application and the basal factors impacting its power dissipation. Following the recommendatory parameters to get the best frequency response and noise immunity. At the nominal work terms, it turns out that the high- frequency amplifier validly and practicably works.
出处
《现代电子技术》
2006年第24期22-24,共3页
Modern Electronics Technique
关键词
宽带高频放大
“S”参数
1dB增益压缩
变调截止
wideband high - frequency amplifier
S - parameters
1 dB gain compression
intermodulation intercept
