高频小信号双参差调谐放大器电路分析与特性仿真研究

Research on Circuit Analysis and Characteristic Simulation of High Frequency Small Signal Double Staggered Tuned Amplifier

高频小信号调谐放大器是电子装备中的常用电路,为了拓宽通频带、改善选择性,实际中常采用双参差调谐放大器。双参差调谐放大器中两级级联的单调谐放大器电路结构相同、谐振频率不同,合理地选择单调谐放大器电路选频网络的电路参数,可使双参差调谐放大器电路具有宽单峰特性或双峰频率特性,实现较宽的通频带和较好的选择性。借助Multisim仿真软件可对电路结构和参数进行设计优化。

High-frequency small-signal tuned amplifiers are commonly used circuits in electronic equipment.In order to widen the passband and improve the selectivity,double-staggered tuned amplifiers are often used in practice.The two-stage cascaded single-tuned amplifiers in the double-staggered tuned amplifier have the same circuit structure and different resonance frequencies.Reasonable selection of the circuit parameters of the frequency selection network of the single-tuned amplifier circuit can make the double-staggered tuned amplifier circuit have a wide single-peak frequency characteristic or double-peak frequency characteristics,and achieve a wider passband and better selectivity.The circuit structure and parameters can be optimized with the help of Multisim simulation software.