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Design of Sinusoidal Signal Generator Based on DDS Technology

机译:基于DDS技术的正弦信号发生器的设计

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this paper designs a sinusoidal signal generator applying a high level of integrated chip AD9851 based on the principle of Direct Digital Frequency Sviithesis(DDS). Through parallel communications between STC89C52 microcontroller and AD9851, corresponding frequency-phase control words are written to the AD98S1 chip. In this paper, a 15MHz frequency, 45° epoch angle sine wave is taken for example. Detailed analysis of the realization process of the sine wave is presented. A Low-pass filter is used to reduce the interference of the high-frequency signals, thus a small distortion sine wave is obtained. The signal is connected to 1012 load after power amplification. The effective value of output voltage is 7.2V; the output power is 5W. The circuit structure is simple and easy to control.
机译:本文基于直接数字频率变换(DDS)原理,设计了一种采用高级集成芯片AD9851的正弦信号发生器。通过STC89C52微控制器和AD9851之间的并行通信,相应的频率相位控制字被写入AD98S1芯片。本文以15MHz频率,45°时角正弦波为例。给出了正弦波实现过程的详细分析。使用低通滤波器来减少高频信号的干扰,从而获得较小的失真正弦波。功率放大后,该信号连接到1012负载。输出电压有效值为7.2V;输出功率为5W。电路结构简单,易于控制。

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