基于AD9954的信号发生器设计_陈国强.pdf

29 8 实 验 室 研 究 与 探 索 V ol. 29 N o. 8 20 10 8 RESEA RCH AND EXPLORAT ION IN LA BORATORY A ug. 20 10 AD9954 陈 国强 ( , 512005 : 为了满足不断发展的生产科研需求, 设计了一种新型的 号发生器该 号发生器主要以目 前较先进的AD9954 芯片为核心, 用单片机AT 89C51作系统的控制, 以键盘和液晶显示器作为人机交互 界面, 对芯片产生的电流 号电压转换后进行放大, 去除各级干扰后输出不但能产生传统的波形 号, 还能产生 FSK 系列 号PSK 系列 号单向线性扫频 号和连续单向扫频 号等, 而且所产生的 号具有高频率高稳定度高精度抗干扰能力强的优点该 号发生器具有结构简单性能优良使 用方便制作成本低廉等优点, 适用于教学科研和市场生产需求 : 直接数字频率合成; 号发生器; AD9954; 单片机 : TN 9 8 : B : 1006- 7167 ( 2010 08- 0222- 04 The Des ign of S igna lGenerato r Based on the AD9954 CH EN Guoqiang ( A ssets departm ent, Shaoguan Co llege, Shaoguan 5 12005, China Ab stract: A new type of signal generator w as designed for g row ing production and research, wh ich u sed advanced AD9954 ch ip as the core. W ith AT 89C51 m icrocontroller as the controller o f system, the keyboard and LCD d isplay as the hum anm achine interface, then amp lify the vo ltage signal w hich is coverted from current signa l and rem oved interference at all levers. A ll of the tradit iona lw aveform signa,l FSK series signa,l PSK series signal, a onew ay linear frequency sw eep signal and cont inuou s un id irect iona l sw eep signals can be generated, and w ith high frequency, h igh stab ility, high accuracy, and ant ijamm ing capability advantages. Becau se o f the advantages o f smi ple structure, exce llent perform ance, easy to u se, low product ion cos,t it is suitab le fo r teach ing, research and production needs o f the m arket. Key words: d irect d ig ital synthesizer ( DDS ; signal generator; AD9954; m icrocontroller