中文摘要：

只读的记忆(ROM ) 广泛地作为在直接数字的频率合成器(DDFS ) 印射块的 phase-to-amplitude 被实现。这份报纸在 DDFS 为 ROM 导出一个相等的模型分析并且减少对 DDFS 的表演批评的存取时间。而且，信号斜在模拟观察到波形被说明。建议了 64

英文摘要：

Read-only memory （ROM） is widely implemented as a phase-to-amplitude mapping block in direct digital frequency synthesizers （DDFS）.This paper derives an equivalent model for the ROM in a DDFS to analyze and reduce the access time that is critical to the performance of the DDFS.Moreover,the signal skew observed in the simulation waveform is illustrated.The proposed 64×3-bit ROM is integrated as a part of an 8-bit DDFS,which operates functionally at 6 GHz.Measurement results demonstrate the improvement in the spur free dynamic range.