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发明申请
US20080112524A1 Phase locked loops capable of burn-in testing with increased locking range and burn-in testing method thereof 失效
锁相环能够通过增加锁定范围和老化测试方法进行老化测试

Phase locked loops capable of burn-in testing with increased locking range and burn-in testing method thereof
摘要：
In phase locked loop, a phase detector detects a phase difference between a first clock signal and a second clock signal and output a first output signal based on the detected difference. A charge pump generates a control voltage in response to the first output signal from the phase detector. A voltage-controlled oscillator generates the second clock signal. A controller controls the control voltage such that the phase difference between the first clock signal and the second clock signal is increased in response to a burn-in test mode signal.
摘要（中）：

在锁相环中，相位检测器检测第一时钟信号和第二时钟信号之间的相位差，并基于检测到的差值输出第一输出信号。 电荷泵响应于来自相位检测器的第一输出信号产生控制电压。 压控振荡器产生第二时钟信号。 控制器控制控制电压，使得响应于老化测试模式信号，第一时钟信号和第二时钟信号之间的相位差增加。

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