clock skew, jitter, glitch

本文探讨了时钟偏差(clockskew)、时钟抖动(clockjitter)、信号毛刺(glitch)及占空比(dutycycle)等概念,深入解析信号完整性的关键要素及其对电子系统设计的影响。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

clock skew指的是clock经过不同的路径之后产生的相位上的偏差;

clock jitter指的是clock频率上的抖动;

glitch指的是信号毛刺;

duty cycle指的是占空比

转载于:https://www.cnblogs.com/lybinger/p/10144918.html

### SKEW JITTER in Computer Systems or Networks Skew jitter refers to the variation of signal arrival times across different channels within a system, which can lead to timing discrepancies and potential data corruption. In high-speed digital communication systems, skew jitter arises from differences in propagation delays between multiple signals that should ideally arrive simultaneously at their destination. In computer systems and networks, skew jitter is particularly critical because it affects synchronization mechanisms such as clock recovery circuits used in serial communications interfaces[^1]. When designing printed circuit boards (PCBs), engineers must carefully manage trace lengths to minimize skew effects on parallel bus lines carrying related bits of information. To mitigate skew jitter: - Designers use matched-length routing techniques where all conductive paths have equal physical dimensions. - Employing specialized hardware components like phase-locked loops (PLLs) helps compensate for minor variations by adjusting output phases dynamically based on feedback measurements taken during operation. ```python def calculate_skew_jitter(delay_list): """ Calculate average absolute difference between each pair's delay values Args: delay_list (list): List containing individual channel delays Returns: float: Average Skew Jitter value over pairs comparison """ n = len(delay_list) total_diff_sum = sum(abs(x - y) for i, x in enumerate(delay_list) for j, y in enumerate(delay_list) if i != j) return total_diff_sum / ((n * (n - 1)) // 2) # Example usage with hypothetical delay measurements per channel/path delays = [0.987e-9, 1.003e-9, 1.015e-9] # seconds avg_skew_jitter = calculate_skew_jitter(delays) print(f"Average Skew Jitter among given channels: {avg_skew_jitter:.2f} ns") ```
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值