The zigzag waveform movement curve is often used in the scanning mirror of thermal imager, so its performance and frequency are limited by the delay time of returning movement.
热像仪扫描摆镜通常采用锯齿波形运动曲线，扫描频率和效率取决于回扫间隔时间。
However, extending the upper frequency of such function signal generator is limited by the read-out time of the memory and the conversion rate of the digital-to-analog converter.
可是，这种信号发生器的上限频率的提高受存储器的读取时间和数模转换器的转换速度的限制。为了提高数字法函数信号发生器的上限频率，我们提出了用分布存储式数字法生成函数信号。
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