公开(公告)号：EP0563400A1

公开(公告)日：1993-10-06

申请号：EP92921477.3

申请日：1992-10-16

申请人： MORI, Shinsaku ,  SHINTOM CO., LTD

发明人： MORI, Shinsaku, Keio Gijuku Daigaku, Rikougakubu ,  PARK, Duk-Kyu, Keio Gijuku Daigaku Rikougakubu Den ,  MIYAGI, Hiroshi, Room 204, Itohpia-Tsunashima-

IPC分类号： H03L7/18 ,  H03L7/197 ,  H03K23/66 ,  H03K23/68

CPC分类号： H03L7/18

摘要： A frequency synthesizer provided with a phase comparator (10) for comparing a feedback frequency with a reference frequency, a filter (12) connected to the phase comparator (10) and passing low frequencies, a voltage-controlled oscillator (14) connected to the filter (12), a multistage frequency converter (16) receiving the oscillation signal generated by the voltage-controlled oscillator (14), a frequency demultiplier for forming a feedback frequency by frequency-demultiplying the output of the multistage frequency converter (16). The multistage frequency converter (16) is constituted by connecting a plurality of frequency converters, which perform non-integer frequency-demultiplication, in series or in parallel with each other. Consequently the ratio of the frequency-demultiplication can be set arbitrarily and finely. Thereby, no matter how the output frequency of the frequency synthesizer changes, the feedback frequency inputted to the phase comparator can be set constant and high. Therefore, the reference frequency can be set as high as the feedback frequency too, independently of the spacing frequency between the output channels of the voltage-controlled oscillator (14), and the speed of ziehen effect can be made very high.

摘要翻译： 一种频率合成器，其具有用于将反馈频率与参考频率进行比较的相位比较器（10），连接到所述相位比较器（10）并通过低频的滤波器（12），连接到所述基准频率的压控振荡器 滤波器（12），接收由压控振荡器（14）产生的振荡信号的多级变频器（16），用于通过对多级变频器（16）的输出进行频率偏差来形成反馈频率的分频器。 多级变频器（16）通过串联或并联连接多个执行非整数分频的变频器来构成。 因此，可以任意且精细地设定分频比。 因此，无论频率合成器的输出频率如何变化，输入到相位比较器的反馈频率可以设定为恒定和高。 因此，与压控振荡器（14）的输出通道之间的间隔频率无关，参考频率也可以设置为反馈频率的高，并且可以使zhenhen效应的速度非常高。