首页> 外国专利> Fractional-N divider, fractional-N phase locked loop and method of dividing a frequency f of an output signal by N, wherein N is a non-integer

Fractional-N divider, fractional-N phase locked loop and method of dividing a frequency f of an output signal by N, wherein N is a non-integer

机译：小数N分频器，小数N锁相环以及将输出信号的频率f除以N的方法，其中N是非整数

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摘要

A fractional-N divider for dividing a frequency f of an output signal by N, where N is a non-integer. The fractional-N divider includes an oscillator 209 adapted to provide K output signals I,I=I₁, . . . , I_K. Each output signal I has the same frequency f and period T. The output signals I are mutually phase shifted by T/K or a multiple of T/K. The fractional-N divider further comprises a multiplexer 211 adapted to select one signal from the K output signals I. The selected signal is phase shifted by M*T/K in relation to a previously selected signal, where M is an integer. Additionally, the fractional-N divider comprises a counter 206 adapted to receive said selected signal. The counter 206 is adapted to count a predetermined number X of periods of the selected signal, whereupon the counter 206 outputs a counter signal 230. The counter 206 is connected to a control input of the multiplexer 211. The multiplexer 211 is adapted to switch from a currently selected output signal to another selected output signal in response to said counter signal 230.

机译：小数N分频器，用于将输出信号的频率f除以N，其中N为非整数。小数N分频器包括一个振荡器 209 ，该振荡器适于提供K个输出信号I，I = I _{1 ，。。。，我_{K 。每个输出信号I具有相同的频率f和周期T。输出信号I相互移相T / K或T / K的倍数。小数N分频器还包括多路复用器 211 ，该多路复用器 211 适于从K个输出信号I中选择一个信号。所选信号相对于先前所选信号相移了M * T / K，其中M是整数。另外，分数N分频器包括适于接收所述选择信号的计数器 206 。计数器 206 适于对预定数量的选定信号的周期X进行计数，随后计数器 206 输出计数器信号 230 。计数器 206 连接到多路复用器 211 的控制输入。多路复用器 211 适于响应于所述计数器信号 230从当前选择的输出信号切换到另一选择的输出信号。}} 展开▼

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公开/公告号US2006132200A1

专利类型

公开/公告日2006-06-22

原文格式PDF

申请/专利权人 MARKUS DIETL;
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申请/专利号US20050314991

发明设计人 MARKUS DIETL;
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申请日2005-12-21

分类号H03B19/00;

国家 US

入库时间 2022-08-21 21:48:00

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