单片机与嵌入式系统应用
單片機與嵌入式繫統應用
단편궤여감입식계통응용
MICROCONTROLLER & EMBEDDED SYSTEM
2014年
10期
37-40
,共4页
直接数字合成%椭圆低通滤波器%STM32F107%VC6.0
直接數字閤成%橢圓低通濾波器%STM32F107%VC6.0
직접수자합성%타원저통려파기%STM32F107%VC6.0
direct digital synthesis%elliptic low-pass filter%STM32F107%VC6.0
针对目前测量分析、弱信号检测的需求,以 STM32 F107和 AD9958为核心实现了一种高分辨率幅度、频率、相位的双路信号源。首先对直接数字合成(Direct Digital Synthesis,DDS)工作原理进行介绍,重点分析了杂散的主要来源,并设计 LC椭圆低通滤波器对杂散进行抑制。设计输出电路使信号源满足低频需求,并可直接用于驱动负载。最后采用STM32 F107和 VC6.0搭建了配置平台,对信号源波形灵活控制。
針對目前測量分析、弱信號檢測的需求,以 STM32 F107和 AD9958為覈心實現瞭一種高分辨率幅度、頻率、相位的雙路信號源。首先對直接數字閤成(Direct Digital Synthesis,DDS)工作原理進行介紹,重點分析瞭雜散的主要來源,併設計 LC橢圓低通濾波器對雜散進行抑製。設計輸齣電路使信號源滿足低頻需求,併可直接用于驅動負載。最後採用STM32 F107和 VC6.0搭建瞭配置平檯,對信號源波形靈活控製。
침대목전측량분석、약신호검측적수구,이 STM32 F107화 AD9958위핵심실현료일충고분변솔폭도、빈솔、상위적쌍로신호원。수선대직접수자합성(Direct Digital Synthesis,DDS)공작원리진행개소,중점분석료잡산적주요래원,병설계 LC타원저통려파기대잡산진행억제。설계수출전로사신호원만족저빈수구,병가직접용우구동부재。최후채용STM32 F107화 VC6.0탑건료배치평태,대신호원파형령활공제。
Aiming at the demands of measurement analysis and detection of weak signals,a dual-channel signal source with high-resolu-tion amplitude,frequency and phase is realized based on STM32F107 and AD9958.After introducing the working principle of Direct Digital Synthesis (DDS),the paper analyzes main source of the stray and deals with the problem by designing LC elliptic low-pass filter. Then the output circuit is designed to satisfy the low frequency signals and the circuit can be used to drive the loads.The configurable platform is built based on STM32F107 and VC6.0 so as to realize the convenient control of the source waveforms.
