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    • 14. 发明授权
    • Temperature compensation method and apparatus for an output frequency signal based on successive approximation
    • 基于逐次逼近的输出频率信号的温度补偿方法和装置
    • US08125284B2
    • 2012-02-28
    • US12567802
    • 2009-09-28
    • Mi ZhangWeixun Cao
    • Mi ZhangWeixun Cao
    • H03L1/02
    • H03L1/022H03L7/16
    • Techniques of compensating frequency in an output in reference to a reference frequency signal are disclosed. The reference frequency signal may be from a crystal oscillator or other oscillators. Due to the changes of the temperature, the reference frequency signal drifts. According to one aspect of the techniques, a temperature frequency correction word is generated in accordance with a frequency compensation value in view of a current temperature to generate a substantially temperature compensated frequency output from a reference frequency signal. The frequency control word is produced from a successive approximation circuit configured to produce the temperature frequency correction word in accordance with the frequency compensation value in view of the current temperature. Both the temperature frequency correction word and a frequency control word are data represented in a sequence of bits. As a result, the compensated frequency output can be of high precision.
    • 公开了参考频率信号在输出中补偿频率的技术。 参考频率信号可以来自晶体振荡器或其他振荡器。 由于温度的变化,参考频率信号漂移。 根据该技术的一个方面,考虑到当前温度,根据频率补偿值产生温度频率校正字,以从参考频率信号产生基本温度补偿的频率输出。 频率控制字由逐次近似电路产生,该逐次逼近电路被配置为根据当前温度根据频率补偿值产生温度频率校正字。 温度频率校正字和频率控制字都是以比特序列表示的数据。 结果,补偿的频率输出可以是高精度的。