| 卜朝晖,毛 涛,梁志强,陈之纯,江贤峰.基于高速环形振荡器的皮秒量级事件计时测量[J].电子测量与仪器学报,2022,36(5):47-56 |
| 基于高速环形振荡器的皮秒量级事件计时测量 |
| Picosecond-level event timing measurement based on high-speed ring oscillator |
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| DOI： |
| 中文关键词: 事件计时 环形振荡器 全相位 FFT 计时模糊度 |
| 英文关键词:event timing ring oscillator all phase FFT timing ambiguity |
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| 中文摘要: |
| 研究设计基于高速环形振荡器的皮秒量级事件计时器。 利用代表事件的信号上升沿去触发高速环形振荡器,产生与事
件同步的时钟脉冲信号,对正弦参考信号采样,再通过全相位 FFT 算法处理,大幅提高事件计时测量的精度。 实验结果表明,
在正弦参考信号中心频率 f
0
= 10 MHz,全相位 FFT 运算点数 N= 8 192,ADC 的量化位数 b = 14 bits,采样频率 f
s
= 140 MHz 的情
况下,事件计时器能够获得约 3. 16 ps rms 的单次测量精度,时间稳定性优于±0. 31 ps/ h,实验结果与基于理论分析的误差范围
一致,达到皮秒量级事件计时测量。 |
| 英文摘要: |
| A picosecond event timer based on high-speed ring oscillator is studied and designed. The rising edge of the signal
representing the event is used to trigger the high-speed ring oscillator to generate the clock pulse signal synchronized with the event. The
sinusoidal reference signal is sampled and processed by the all phase FFT algorithm to greatly improve the precision of event timing
measurement. Experimental results show that in the case of a sinusoidal reference signal with 10 MHz frequency, a 14 bit ADC with
140 MHz sampling frequency, and the all phase FFT with operation point number N = 8 192, we have achieved the single-shot time
interval measurement precision of 3. 16 ps rms and the time stability are better than ±0. 31 ps/ h. The results are in good agreement with
the error budget based on the theoretical analysis, reaching picosecond-level event timing measurements. |
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