微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2014年
3期
76-78,81
,共4页
多级放大%LC 带通滤波器%Filter-solution%热噪声%均方值%总的均方根噪声
多級放大%LC 帶通濾波器%Filter-solution%熱譟聲%均方值%總的均方根譟聲
다급방대%LC 대통려파기%Filter-solution%열조성%균방치%총적균방근조성
multistage amplification%LC band-pass filter%filter-solution%thermal noise%average mean square value%total rms noise
针对水下近程目标回波信号接收问题，阐述了一款低噪声多级放大信号调理系统，分析了三级放大电路，并着重研究了带通滤波器的设计，利用滤波器设计软件 filter-solutions 对设计的滤波器进行仿真分析。通过分析滤波器电路底噪声，得出 LC 带通滤波器较其他滤波器具有稳定性高、电路结构简单、底噪声较小等特点，有效提高了调理系统的性能。
針對水下近程目標迴波信號接收問題，闡述瞭一款低譟聲多級放大信號調理繫統，分析瞭三級放大電路，併著重研究瞭帶通濾波器的設計，利用濾波器設計軟件 filter-solutions 對設計的濾波器進行倣真分析。通過分析濾波器電路底譟聲，得齣 LC 帶通濾波器較其他濾波器具有穩定性高、電路結構簡單、底譟聲較小等特點，有效提高瞭調理繫統的性能。
침대수하근정목표회파신호접수문제，천술료일관저조성다급방대신호조리계통，분석료삼급방대전로，병착중연구료대통려파기적설계，이용려파기설계연건 filter-solutions 대설계적려파기진행방진분석。통과분석려파기전로저조성，득출 LC 대통려파기교기타려파기구유은정성고、전로결구간단、저조성교소등특점，유효제고료조리계통적성능。
In this paper, we introducte a kind of multistage amplifier signal modulation with low noise for short-range underwater target echo signal reception, three-stage amplifier circuit is analyzed, and focus on the study of the passive band-pass filter design. We introduce the filter design methods, and then simulate and analyze the designed filter by software filter-solutions. Through the noise analysis, we can know the LC band-pass filter is designed not only more stable, simpler circuit structure, also with a lower noise than other filters, and effectively improve the performance of the modulating system.
