| 摘要: |
| 针对低抖动时间幅度调制时钟信号引入滤波失真的问题，提出了一种正弦平滑改进的时间幅度调制方法，对时间幅度调制时钟信号进行正弦函数平滑处理，在保持过零点抖动较小前提下，改善时钟信号的频谱特性。仿真分析和现场可编程门阵列(Field Programmable Gate Array,FPGA)硬件实现结果表明，产生的正弦平滑时间幅度调制时钟信号有效抑制了带限失真，优于普通的数字压控振荡器和原始的时间幅度调制时钟信号。 |
| 关键词: 低抖动时钟 时间幅度调制；正弦平滑；带限失真 |
| DOI： |
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| 基金项目: |
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| Low jitter clock signal generated by sinusoidal smoothing time-amplitude modulation method |
| SU Yanting,SONG Maozhong,CUI Chang,SHEN Tong,YAN Feng |
| (College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China) |
| Abstract: |
| To solve the problem of filtering distortion caused by low jitter time-amplitude modulated clock signal,a sinusoidal smoothing method is proposed to smooth the time-amplitude modulation clock signal.Under the premise of keeping the zero-crossing error smaller,the spectral characteristics of the clock signal are improved.Through the simulation analysis and the field programmable gate array(FPGA) hardware implementation,the results show that the sinusoidal smoothing time-amplitude modulated clock signal effectively restrains the band-limited distortion,and it is superior to ordinary numerically controlled oscillator and original time-amplitude modulated clock signals. |
| Key words: low jitter clock time-amplitude modulation sinusoidal smoothing band-limited distortion |
