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1. 发明申请

US20100321068A1 Frequency Synthesizer 有权
标题翻译：频率合成器
公开(公告)号：US20100321068A1
公开(公告)日：2010-12-23
申请号：US12803294
申请日：2010-06-23
申请人： Tsukasa Kobata , Tsuyoshi Shiobara , Kozuo Akaike , Nobuo Tsukamoto
发明人： Tsukasa Kobata , Tsuyoshi Shiobara , Kozuo Akaike , Nobuo Tsukamoto
IPC分类号： H03B21/00
CPC分类号： H03L7/18 , H03L7/085 , H03L7/091 , H03L7/10 , H03L7/185 , H03L7/187 , H03L2207/06 , H03L2207/12
摘要： An object of the present invention provides a frequency synthesizer having a broad frequency entraining range which can finely set a frequency over a broad band by a novel principle.As s specific solving means, a sinusoidal signal of an output frequency of a voltage-controlled oscillator is subjected to orthogonal detection, a vector rotating at the differential frequency (speed) between the output frequency and the frequency of the frequency signal used for the detection is created, and the frequency of a vector when the output frequency of the voltage-controlled oscillator is equal to a set value is calculated in advance. The voltage signal corresponding to the difference between the frequency of the vector and the calculated frequency is fed back to the voltage-controlled oscillator when the voltage-controlled oscillator is driven, and PLL is formed so that the difference is equal to zero. Accordingly, the output frequency of the voltage-controlled oscillator is adjusted to the set frequency when PLL is locked. After the difference between both the frequencies is increased after PLL is locked, the set value is integrated by the integrating circuit portion and added to the control voltage.
摘要翻译：本发明的目的是提供一种频率合成器，其具有宽的频率夹带范围，可通过新的原理在宽带上精细地设定频率。作为具体的解决方案，对压控振荡器的输出频率的正弦信号进行正交检测，以用于检测的频率信号的输出频率和频率之间的差分频率（速度）旋转的矢量并且预先计算当压控振荡器的输出频率等于设定值时的矢量频率。当驱动压控振荡器时，与矢量频率和计算出的频率之间的差值相对应的电压信号被反馈到压控振荡器，并且形成PLL，使得差值等于零。因此，当PLL被锁定时，压控振荡器的输出频率被调整到设定频率。在PLL被锁定之后两个频率之间的差异增加之后，设定值被积分电路部分积分并加到控制电压上。

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