According to the performance degression with smaller spread amplitude, a novel circuit based on precise phase synthesis is introduced, which is expatiated in this paper.

• 针对实际应用中调制波形质量随着频谱扩展幅度变小而变差的问题，创新的采用了基于精确相位频率合成的频谱扩展技术，显著提高了频谱调制波质量，文中对该技术进行了详细介绍。