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JP2008109589A Signal generating apparatus 有权
标题翻译：信号发生装置
公开(公告)号：JP2008109589A
公开(公告)日：2008-05-08
申请号：JP2006292794
申请日：2006-10-27
申请人： Iwatsu Test Instruments Corp , 岩通計測株式会社
发明人： UCHIKUBO KOUTA
IPC分类号： H03K3/02 , G06F1/04 , G06F1/08 , H03L7/099
摘要： PROBLEM TO BE SOLVED: To generate a high-precision frequency-variable rectangular pulse signal while suppressing generation of jitter in a frequency-variable signal generating apparatus using a general-purpose DDS (direct digital synthesizer). SOLUTION: The frequency-variable signal generating apparatus comprises a DDS 1 which outputs an analog signal of a frequency to be changed in accordance with a setting value; a comparator 3 which generates a first rectangular pulse signal of the frequency from the analog signal; a programmable frequency divider 41 which outputs a second rectangular pulse signal frequency-dividing the first rectangular pulse signal in a set frequency dividing ratio; and a control unit 4. When changing the frequency to a higher frequency domain side, the first rectangular pulse signal is defined as an output signal So for the frequency divider. When changing the frequency to a lower frequency domain side, the setting value is changed and controlled to a value of the frequency dividing ratio multiple for the DDS, the first rectangular pulse signal having a frequency of the frequency dividing ratio multiple is generated, and the second rectangular pulse signal of the relevant frequency divided in the relevant frequency dividing ratio in the frequency divider is defined as the output signal So. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了在抑制使用通用DDS（直接数字合成器）的频率可变信号发生装置中产生抖动的同时产生高精度的可变频矩形脉冲信号。解决方案：频率可变信号发生装置包括：DDS 1，其根据设定值输出要变化的频率的模拟信号; 比较器3，其从模拟信号产生频率的第一矩形脉冲信号; 输出以设定的分频比对第一矩形脉冲信号进行分频的第二矩形脉冲信号的可编程分频器41; 以及控制单元4.当将频率改变为较高频域侧时，第一矩形脉冲信号被定义为分频器的输出信号So。当将频率改变为较低频域侧时，将设定值改变并控制为DDS的分频比倍数，产生具有分频比倍数的频率的第一矩形脉冲信号，并且以分频器中的相关分频比划分的相关频率的第二矩形脉冲信号被定义为输出信号So。版权所有（C）2008，JPO＆INPIT

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