首页> 外国专利> Apparatus for performing sigma-delta modulation useful in frequency synthesizer, has pulse generator configured to generate multi-bit signal having at least one pulse, and sigma-delta modulator configured to modulate the multi-bit signal

Apparatus for performing sigma-delta modulation useful in frequency synthesizer, has pulse generator configured to generate multi-bit signal having at least one pulse, and sigma-delta modulator configured to modulate the multi-bit signal

机译：用于执行在频率合成器中使用的sigma-delta调制的设备，具有配置为生成具有至少一个脉冲的多比特信号的脉冲发生器，以及配置为调制多比特信号的sigma-delta调制器

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摘要

An apparatus for performing sigma-delta modulation, comprises a pulse generator configured to generate a multi-bit signal having at least one pulse, the at least one pulse having a period P and a variable duty cycle; and sigma-delta modulator configured to modulate the multi-bit signal and to generate a digital code. Independent claims are also included for: (A) frequency synthesizer comprising a sigma-delta modulator configured to generate a random digital code based on a multi-bit frequency resolution control signal having at least one pulse; frequency divider configured to divide a voltage controlled oscillating frequency signal, based on the random digital code; phase frequency detector configured to detect a phase difference and a frequency difference between a reference frequency signal and the divided voltage controlled oscillating frequency signal; charge pump configured to pump charges corresponding to an output of the phase frequency detector; loop filter configured to filter a low frequency component of an output of the charge pump; and voltage controlled oscillator configured to generate the voltage controlled oscillating frequency signal based on an output of the loop filter; and (B) fractional-N frequency synthesizing method comprising generating a random digital code based on a multi-bit frequency resolution control signal having at least one pulse; dividing a voltage controlled oscillating frequency signal based on the random digital code; detecting a phase difference and a frequency difference between a reference frequency signal and the divided voltage controlled oscillating frequency signal; pumping charges corresponding to an output of the detecting step; filtering a low frequency component of an output of the pumping step; and generating the voltage controlled oscillating frequency signal based on an output of the filtering step.

机译：一种用于执行∑-Δ调制的设备，包括：脉冲发生器，被配置为产生具有至少一个脉冲的多位信号，所述至少一个脉冲具有周期P和可变占空比;以及∑-Δ调制器被配置为调制多比特信号并产生数字代码。还包括以下独立权利要求：（A）频率合成器，其包括被配置为基于具有至少一个脉冲的多位频率分辨率控制信号来生成随机数字代码的∑-Δ调制器;以及分频器，被配置为基于随机数字码对压控振荡频率信号进行分频;相位频率检测器，用于检测参考频率信号与分压控制的振荡频率信号之间的相位差和频率差;电荷泵，被配置为泵送与所述相位频率检测器的输出相对应的电荷;环路滤波器，被配置为对电荷泵的输出的低频分量进行滤波;压控振荡器，被配置为基于环路滤波器的输出来产生压控振荡频率信号; （B）小数N分频频率合成方法，其包括基于具有至少一个脉冲的多比特的频率分辨率控制信号来生成随机数字代码。根据随机数字码对电压控制的振荡频率信号进行分频;检测参考频率信号与分压控制的振荡频率信号之间的相位差和频率差;抽出与检测步骤的输出相对应的电荷;滤波泵浦步骤的输出的低频分量;根据滤波步骤的输出，产生电压控制的振荡频率信号。

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公开/公告号DE102006007715A1

专利类型
公开/公告日2006-10-26

原文格式PDF
申请/专利权人 SAMSUNG ELECTRONICS CO. LTD.;
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申请/专利号DE20061007715
发明设计人 YU HWA-YEAL;
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申请日2006-02-14
分类号H03M3/04;H03L7/197;
国家 DE
入库时间 2022-08-21 21:20:07

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