The paper introduces the design of digital clock based on FPGA and VHDL, the time of clock can be displayed with the digital driving circuit.
介绍了利用VHDL硬件描述语言结合FPGA可编程器件进行数字钟的设计，并通过数码管驱动电路动态显示计时结果。
They came out of the cinema at 11 o 'clock, got into their car and began driving home.
晚上十一点，他们从电影院出来，钻进汽车，开始驾车回家。
Finally, the clock waveforms driving the device are given.
最后给出了器件的驱动时钟波形。
The latter provides the control and clock signals for the driving circuitry on screen and accomplishes the video data processing.
后者为屏上驱动电路提供控制、时钟信号，完成视频数据的处理。
However, if he ignores his internal clock and attempts to live on a normal schedule, DSPS can cause difficulty thinking clearly, driving safely, and generally functioning well.
假如这些人忽视自己的生物钟的模式，非要按照常规时间表作息，就会导致思路不清晰、驾驶不专心等一系列功能性紊乱现象。
However, if he ignores his internal clock and attempts to live on a normal schedule, DSPS can cause difficulty thinking clearly, driving safely, and generally functioning well.
假如这些人忽视自己的生物钟的模式，非要按照常规时间表作息，就会导致思路不清晰、驾驶不专心等一系列功能性紊乱现象。
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