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    188宝金博页面版: DDS信号发生器外文资料翻译

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    内容提示： Design of Digital Controlled Signal Generator Based on DDS and MCU Yinjun Chena, Zehuai Yuan Faculty of Electronic Information and Mechanical Electrical Engineering, Zhaoqing University, Zhaoqing 526061, China Keywords: DDS; MCU; Signal generator; Phase Accumulator; DAC Abstract. Its advantage to use DDS chip is output signal frequency bigger, and precision higher, Butusers can't change the output signal waveforms. The MCU can produce the required arbitrary waveforms, but its program execution of the...

    文档格式：DOCX | 页数：17 | 浏览次数：28 | 上传日期：2013-12-31 19:12:17 | 文档星级：
    Design of Digital Controlled Signal Generator Based on DDS and MCU Yinjun Chena, Zehuai Yuan Faculty of Electronic Information and Mechanical Electrical Engineering, Zhaoqing University, Zhaoqing 526061, China Keywords: DDS; MCU; Signal generator; Phase Accumulator; DAC Abstract. Its advantage to use DDS chip is output signal frequency bigger, and precision higher, Butusers can't change the output signal waveforms. The MCU can produce the required arbitrary waveforms, but its program execution of the order limit the speed.So we use their Synergy to designthe digital controlled signal generator. The System has the advantage of output good qualitywaveform, frequency of precision and stability ,and high frequency, empty, amplitude and phase is tostep into the need. Introduction The digitally synthesized sine waveform (Direct Digital Synthesis, DDS) is a well-known method andhas been applied to many embedded applications [1]. This technique can be used to create a positivedigital sine waveform. Compared to other frequency composing method, Direct Digital FrequencySynthesis(DDS) has been the most popular trend in modern frequency synthetic technique for itsexcellent characteristics. The signal source that the DDS technology realizes can carry out accuratecontrolling on DDS frequency , extent , phase exporting wave form's etc. by numerical control circuit,the system making use of this method has many merits such as stability, reliably and accuracy. The commercial DDS chip can only export a sine wave for the data in the ROM form already hasbeen solidified. If needing to come into being any wave form, it may come true by the way that FPGAadopts DDS IP core or hardware describe language etc, however,the cost of This way cost is high; onthe other hand, any wave form can be achieved by making use of micro controller unit (MCU) to carryout figure frequency combining and DA converting. The experiment and applying testing have shownthat the numerical control signal source composed of STM32 micro controller and DDS chip canwork well. DDS and wave form programming pattern The core of DDS system is phase accumulator carriage, and it is composed of a ADR and one

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