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2. 发明授权

US07545228B1 Dynamic temperature compensation for a digitally controlled oscillator using dual MEMS resonators 有权
标题翻译：使用双MEMS谐振器的数字控制振荡器的动态温度补偿
公开(公告)号：US07545228B1
公开(公告)日：2009-06-09
申请号：US11854517
申请日：2007-09-12
申请人： Crist Lu , Erno Klaassen , Sathi Perumal
发明人： Crist Lu , Erno Klaassen , Sathi Perumal
IPC分类号： H03L1/00 , H03B5/30
CPC分类号： H03H9/02448 , H03L1/026
摘要： A method for generating a temperature-compensated timing signal that includes counting, within an update interval, a first number of oscillations of a first micro-electromechanical (MEMS) resonator, a second number of oscillations of a second MEMS resonator and a third number of oscillations of a digitally controlled oscillator (DCO), computing a target DCO count based on the first number and second number of oscillations, computing a loop error signal based on the target DCO count and the third number of oscillations, and modifying an output frequency of a temperature-dependent (DCO) timing signal based on the loop error signal. The duration of the update interval may also be modified based on temperature conditions, and the update interval may also be interrupted and the output frequency immediately adjusted, if a significant temperature change is detected. Thus, dynamic and precise temperature compensation is achieved that accommodates constant, slowly changing, and rapidly changing temperature conditions.
摘要翻译：一种用于产生温度补偿定时信号的方法，包括在更新间隔内对第一微机电（MEMS）谐振器的第一数量的振荡，第二MEMS谐振器的第二数量的振荡和第三数量的数字控制振荡器（DCO）的振荡，基于第一数量和第二振荡次数来计算目标DCO计数，基于目标DCO计数和第三振荡次数来计算环路误差信号，以及修改基于环路误差信号的温度依赖（DCO）定时信号。还可以基于温度条件修改更新间隔的持续时间，并且如果检测到显着的温度变化，则更新间隔也可以被中断并且立即调整输出频率。因此，实现了适应恒定，缓慢变化和快速变化的温度条件的动态和精确的温度补偿。

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