The paper discusses on DDS spectrum purity improvement, and gives the circuit scheme.
对如何提高DDS输出频谱纯度进行了探讨，并给出电路解决方案。
This circuit provides high purity sine-wave output down to low frequencies with minimum circuit complexity.
这个电路以最简洁的结构实现了高纯净度正弦波输出，而且在较低的频率上也是如此。
Access to organic semiconductors in sufficient purity and variety has led to breakthroughs in solid-state physics and circuit realization.
获得充足的有机半导体的纯度和品种已导致突破固体物理和电路实现。
Access to organic semiconductors in sufficient purity and variety has led to breakthroughs in solid-state physics and circuit realization.
获得充足的有机半导体的纯度和品种已导致突破固体物理和电路实现。
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