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    • 2. 发明申请
    • On-chip variable oscillator method and apparatus
    • 片上可变振荡器的方法和装置
    • US20060055474A1
    • 2006-03-16
    • US11266863
    • 2005-11-04
    • Jason Culler
    • Jason Culler
    • H03K3/03
    • H03L7/0995H03K3/0315
    • A method and apparatus for creating a variable frequency-oscillating signal on a semiconductor device. The frequency of a ring oscillator is varied by inserting or removing additional delay into the ring. The frequency of the oscillating signal is periodically compared to an encoded input signal indicating the desired frequency. The comparison result modifies the desired frequency by modifying the amount of delay in the ring oscillator. In an alternate embodiment, an input reference clock is converted to an encoded representation of the input reference clock's current frequency. This resultant encoded representation is compared to the encoded representation of the variable frequency-oscillating signal to determine whether the delay in the ring oscillator should be modified so the frequency of the variable oscillating signal matches the frequency of the input reference clock.
    • 一种在半导体器件上产生可变频率振荡信号的方法和装置。 环形振荡器的频率通过插入或除去额外的延迟到环中来改变。 周期性地将振荡信号的频率与表示期望频率的编码输入信号进行比较。 比较结果通过修改环形振荡器的延迟量来修改所需的频率。 在替代实施例中,输入参考时钟被转换为输入参考时钟的当前频率的编码表示。 将该结果编码表示与可变频率振荡信号的编码表示进行比较,以确定环形振荡器中的延迟是否应被修改,使得可变振荡信号的频率与输入参考时钟的频率相匹配。