相位可控多通道任意波形信号源卡设计

Design of Multi-channels Controllable Phase Arbitrary Waveform Signal Generator

在遥感测试系统中,模拟信号发生器用于模拟动态测试环境下不同传感器输出信号和在存储器、采编器调试时提供标准信号,从而进行设备测试或数据分析。设计采用"FPGA(DDS相位控制)+单片DAC+多路模拟开关阵列"的方法实现32路任意波形输出。上位机软件中设置波形的幅值、频率、相位等信息,通过FPGA对参数控制字进行检测,改变对应通道的模拟开关导通状态,从而实现对输出波形通道间相位差的任意控制。

In remote sensing system,analog signal generator is used to simulate output signals of different sensors under the dynamic test environment,and it also can provide standard signals to test equipment and analyze data. This device adopted the method of ＂FPGA（ DDS phase control） ＋ one chip DAC ＋ multi-channel analog switch array＂to realize 32 channels arbitrary waveform output. The waveform amplitude,frequency,phase and other information were set in PC software. By detecting the parameter control word in FPGA,the corresponding analog switch conducting state was changed to achieve the arbitrary controlling of phase difference among channels.