垂直偏移量任意可调的信号发生器的FPGA实现  

Realization of a Signal Generator with Optionally Adjustable Vertical Offset Using FPGA

作　　者：陈琳[1] 潘海鸿[1] 黄光永[1] 李家恒[1] 

机构地区：[1]广西大学机械工程学院,南宁530004

出　　处：《电讯技术》2012年第1期67-71,共5页Telecommunication Engineering

基　　金：桂科攻(10100001-2);新世纪广西高等教育教改工程项目(2011JGB003);广西大学项目(20100103)~~

摘　　要：基于FPGA和直接数字频率合成(DDS)技术,提出一种以软件方法实现波形信号垂直偏移量任意可调的信号发生器的设计方案,通过引入除法器、加法器、数据取反器实现对波形信号的幅度调节和垂直偏移量调节。采用FPGA芯片EP1C12Q240C8实验验证了该波形信号发生器不需要外加硬件电路就可以实现对输出波形垂直偏移量的任意调节,且能灵活改变输出波形信号的幅度、相位和频率。This paper proposes a software design scheme based on FPGA and Direct Digital Synthesizer（DDS） technology to realize a signal generator with optionally adjustable vertical offset. In the design scheme, the divider, adder, and data inversion device are used to achieve the adjustment of the waveform amplitude and vertical offset adjustment. The FPGA chip EP1C12Q240C8 is adopted to realize the proposed scheme. The experiment results show that the signal generator can optionally adjust the vertical offset of the output waveform without additional hardware circuit and can also flexibly alter the amplitude, phase and frequency of the output wavefonn signal.

关 键 词：信号发生器 直接数字频率合成 垂直偏移量 

分 类 号：TN74[电子电信—电路与系统]