clock

博客内容嵌入了一个Flash时钟,其源地址为http://www.clocklink.com/clocks/JOL001 - Green.swf?TimeZone=GMT ,宽高为200,模式为透明。
Clock uncertainty mainly refers to issues such as skew and noise in the clocking system. As system clocking speeds increase, skew and noise become primary considerations. Skew is the difference in arrival times of a clock signal at different parts of a circuit, and noise can disrupt the integrity of the clock signal. Increasing clock frequencies and requiring tighter tolerances in clocking circuits are ways to achieve future gains in system performance. However, these also exacerbate the problems of clock uncertainty. Low skew clock buffers and PLL clock drivers can help designers meet system requirements for speed, skew, and noise. But the clock circuit must be designed as a comprehensive clocking system, taking into account all aspects of the clock distribution network, including the driver, receivers, transmission lines, and signal routing [^1]. The impact of clock uncertainty on IT systems is significant. It can lead to timing errors in the system, which may cause data to be read or written at incorrect times, resulting in system malfunctions or reduced performance. For example, in high - speed digital circuits, even small amounts of skew can cause data to arrive at flip - flops at the wrong time, leading to incorrect data processing. To address clock uncertainty, creating a timing budget is the best method. A timing budget identifies the effects that each element of the clock tree has on the clock signals, helping designers understand and manage clock tolerances [^1]. ```python # Here is a simple example to illustrate the concept of clock skew calculation # Assume we have two clock arrival times at different points clock_arrival_time_1 = 10 # in nanoseconds clock_arrival_time_2 = 12 # in nanoseconds clock_skew = abs(clock_arrival_time_1 - clock_arrival_time_2) print(f"The clock skew is {clock_skew} nanoseconds") ```
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