【摘要】 在工程和实验研究中，时常要求动态地提供连续的长周期或非周期的复杂信号。为满足这一需要，本文设计并研制了双ＲＡＭ任意波形发生器（ＡＷＧ）微机插卡。从直接数字频率合成出发，介绍了该ＡＷＧ插卡的总体设计，详细描述了本ＡＷＧ电路的硬件实现及其特点。用普通的静态存储器构成的两个大容量双口ＲＡＭ，实现了不间断输出的情况下波形的动态更换；采用直接存储器传送，波形数据更换快；ＩＳＡ总线微机卡式仪器，通用性好，有丰富的软硬件支持，性能价格比高。更多还原

【Abstract】 In engineering and laboratory research, the dynamic long perioriodic and aperiodic waveform singals are often required. To meet this need, a direct digital synthetic (DDS) dased arbitrary waveform generator (AWG) with double RAMs has been studied and developed. Beginning with the DDS, the general design of this AWG PC card is discussed. The principles of the hardware circuits are described and the characteristices of this AWG are also given. The normal statical RAMs are used to construct two daul port RAMs with large capacity memory and so the dynamic waveform change without stopping the output is achieved. Direct memory access is used to transfer the waveform data as soon as possibile. A wide support of the computer software and hardware is available for this PC compatiblie ISA bus AWG. The AWG discussed has a good application perspect and a high perfomance price ratio.更多还原