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    • 10. 发明授权
    • Method and apparatus for producing a clock signal having an initial state at reference point of incoming signal thereafter changing state after a predetermined time interval
    • 用于产生在输入信号的参考点处具有初始状态的时钟信号的方法和装置,此后在预定时间间隔之后改变状态
    • US06671817B1
    • 2003-12-30
    • US09626998
    • 2000-07-27
    • Wayne Snyder
    • Wayne Snyder
    • G06F112
    • G06F1/04G06F1/12
    • An apparatus and method of producing a clock signal synchronize such signal to a periodic incoming signal. Each period in the incoming signal has a reference point that is utilized to produce the clock signal. To that end, the reference point of a first period of the incoming signal first is detected. The clock signal then is set to a first logic level upon detection of the reference point. Moreover, also upon detection of the reference point, a count is begun for a predetermined time interval. The clock signal is latched to a second logic level upon expiration of a portion of the predetermined time interval. The first logic level is different from the second logic level. After the predetermined time interval has expired, the clock signal is set to the first logic level upon detection of the next reference point.
    • 产生时钟信号的装置和方法使这种信号与周期性输入信号同步。 输入信号中的每个周期具有用于产生时钟信号的参考点。 为此,首先检测输入信号的第一周期的参考点。 然后,当检测到参考点时,时钟信号被设置为第一逻辑电平。 此外,在检测到参考点的同时,开始计数一段预定的时间间隔。 当预定时间间隔的一部分期满时,时钟信号被锁存到第二逻辑电平。 第一个逻辑电平与第二个逻辑电平不同。 在预定时间间隔期满后,在检测到下一个参考点时,时钟信号被设置为第一逻辑电平。