公开(公告)号：US07982552B2

公开(公告)日：2011-07-19

申请号：US12423061

申请日：2009-04-14

申请人： Hyunchol Shin ,  Jaewook Shin

发明人： Hyunchol Shin ,  Jaewook Shin

IPC分类号： H03B5/10

CPC分类号： H03L7/087 ,  H03L7/099 ,  H03L7/10 ,  H03L7/1976

摘要： An automatic frequency calibration apparatus and a method thereof for a phase-locked loop based frequency synthesizer are disclosed. The apparatus includes a frequency-to-digital converter configured to convert a frequency of a VCO output signal to a first digital value, a target value setting section configured to provide a second digital value corresponding to a target frequency, and a finite state machine configured to calibrate the frequency of the VCO output signal by using the difference of the first digital value and the second digital value. Accordingly, the calibration speed and a frequency resolution of the automatic frequency calibration apparatus in a frequency synthesizer may be enhanced.

摘要翻译： 公开了一种用于基于锁相环的频率合成器的自动频率校准装置及其方法。 该装置包括配置成将VCO输出信号的频率转换为第一数字值的频数转换器，被配置为提供与目标频率相对应的第二数字值的目标值设置部分和配置的有限状态机 通过使用第一数字值和第二数字值的差来校准VCO输出信号的频率。 因此，可以提高频率合成器中的自动频率校准装置的校准速度和频率分辨率。

公开(公告)号：US20100213984A1

公开(公告)日：2010-08-26

申请号：US12423061

申请日：2009-04-14

申请人： Hyunchol Shin ,  Jaewook Shin

发明人： Hyunchol Shin ,  Jaewook Shin

IPC分类号： H03B21/00 ,  H03L7/06

CPC分类号： H03L7/087 ,  H03L7/099 ,  H03L7/10 ,  H03L7/1976

摘要： An automatic frequency calibration apparatus and a method thereof for a phase-locked loop based frequency synthesizer are disclosed. The apparatus includes a frequency-to-digital converter configured to convert a frequency of a VCO output signal to a first digital value, a target value setting section configured to provide a second digital value corresponding to a target frequency, and a finite state machine configured to calibrate the frequency of the VCO output signal by using the difference of the first digital value and the second digital value. Accordingly, the calibration speed and a frequency resolution of the automatic frequency calibration apparatus in a frequency synthesizer may be enhanced.

摘要翻译： 公开了一种用于基于锁相环的频率合成器的自动频率校准装置及其方法。 该装置包括配置成将VCO输出信号的频率转换为第一数字值的频数转换器，被配置为提供与目标频率相对应的第二数字值的目标值设置部分和配置的有限状态机 通过使用第一数字值和第二数字值的差来校准VCO输出信号的频率。 因此，可以提高频率合成器中的自动频率校准装置的校准速度和频率分辨率。

公开(公告)号：US08008956B1

公开(公告)日：2011-08-30

申请号：US12789940

申请日：2010-05-28

申请人： Hyunchol Shin ,  Jaewook Shin

发明人： Hyunchol Shin ,  Jaewook Shin

IPC分类号： H03L7/06

CPC分类号： H03L7/113 ,  H03L7/085 ,  H03L7/0898 ,  H03L7/099 ,  H03L7/1976 ,  H03L2207/04 ,  H03L2207/06

摘要： A frequency synthesizer and an automatic calibration device are disclosed. An automatic calibration device for a phase-locked loop based frequency synthesizer includes: a frequency-to-digital converter for converting a frequency of a signal outputted from a voltage controlled oscillator into a first digital value; a frequency difference detector for calculating a difference between the first digital value outputted from the frequency-to-digital converter and a second digital value corresponding to a target frequency; an automatic frequency calibration logic for selecting an optimal control code for a capacitor bank such that an output frequency of the voltage controlled oscillator is closer to the target frequency; and a loop bandwidth calibration logic for tuning a charge pump gain such that a loop bandwidth is kept constant in the optimal control code using the frequency-to-digital converter. Thus, the calibration speed can be increased, and the loop bandwidth can be kept constant within the output frequency range.

摘要翻译： 公开了一种频率合成器和自动校准装置。 一种用于基于锁相环的频率合成器的自动校准装置包括：频数转换器，用于将从压控振荡器输出的信号的频率转换为第一数字值; 频率差检测器，用于计算从频数转换器输出的第一数字值与对应于目标频率的第二数字值之间的差; 自动频率校准逻辑，用于选择用于电容器组的最佳控制码，使得压控振荡器的输出频率更接近目标频率; 以及用于调谐电荷泵增益的环路带宽校准逻辑，使得使用频数转换器的最佳控制码中的环路带宽保持恒定。 因此，可以提高校准速度，并且可以在输出频率范围内使环路带宽保持恒定。