| 一种相位差连续可调的双相信号发生器 |
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| 引用本文： | 郭键,刘丙午. 一种相位差连续可调的双相信号发生器[J]. 计算机测量与控制, 2011, 19(11) |
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| 作者姓名： | 郭键 刘丙午 |
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| 作者单位： | 北京物资学院信息学院,北京,101149 |
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| 基金项目： | 北京市属高等学校人才强教计划资助项目(PHR201007145,PHR201108311); 2010年北京市优秀人才培养资助项目(2010D005009000002); 北京市教育委员会科研基地建设项目(WYJD200902) |
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| 摘 要： | 针对采用移相网络来调节双路输出的相位的不足,以微控制器MSP430F135为主控电路,根据直接接数字频率合成技术(DDFS)的原理,设计了一款相位连续可调的双相、任意波形的信号发生器的硬、软件系统,针对传统计算相位控制字存在的计算量大、频率设定效率低、占用存储空间大或设定频率有误差累积效应等缺点,研制了一种新的计算相位控制字的算法,该方法不需计算大量数据、不需大量存储空间且可显著减低误差的累积效应;以相位累加器位数为28,步距t为0.01为例,采用新算法时,输出相位差的绝对误差最大为1.54×10-6度;利用该算法设计信号发生器既能保持传统任意波形信号发生器的优良性能,又能准确调节两路信号的相位差。
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| 关 键 词： | 双相信号发生器 数字合成技术 相位差连续可调 相位控制字 |
A Novel Dual Tunable Phase Difference Signal Generator |
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| Guo Jian,Liu Bingwu. A Novel Dual Tunable Phase Difference Signal Generator[J]. Computer Measurement & Control, 2011, 19(11) |
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| Authors: | Guo Jian Liu Bingwu |
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| Affiliation: | Guo Jian,Liu Bingwu(Information School,Beijing Wuzi University,Beijing 101149,China) |
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| Abstract: | To address the shortcomings of adjusting the phase dual output with phase-shifting network,taking MSP 430F135 microcontroller as main control circuit and basing on the principle of direct digital frequency synthesis(DDFS),the hardware and software system of a novel dual tunable phase difference signal generator of arbitrary waveform are designed.To solve the drawbacks of large computation,low efficiency of frequency setting,more storage space occupied or significant cumulative errors of frequency setting wh... |
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| Keywords: | dual phase signal generator direct digital synthesis tunable phase difference phase control word |
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