CAJ | 학술논문

为了解决传统DDS信号发生器的输出波形种类少、幅频控制精度低等缺点，设计了基于SDIO与SPI接口的高精度信号发生器。首先，采用STM32F103作为核心控制器，SDIO接口作为用户波形数据交互口。其次，采用SPI接口将数据传送至WAV数据流解码芯片VS1053，解码后18位D／A输出。然后，采用程控放大器对输出波形进行幅值控制。最后，采用功率放大器进行功率放大。相比于传统信号发生器，可实现任意波形输出，且幅频可控。
위료해결전통DDS신호발생기적수출파형충류소、폭빈공제정도저등결점，설계료기우SDIO여SPI접구적고정도신호발생기。수선，채용STM32F103작위핵심공제기，SDIO접구작위용호파형수거교호구。기차，채용SPI접구장수거전송지WAV수거류해마심편VS1053，해마후18위D／A수출。연후，채용정공방대기대수출파형진행폭치공제。최후，채용공솔방대기진행공솔방대。상비우전통신호발생기，가실현임의파형수출，차폭빈가공。
In order to overcome the problem that the frequency and amplitude of the traditional signal generator of direct digital frequency synthesizer( DDS) is hard to control,a new signal generator based on SDIO and SPI interface was introduced.Firstly, STM32F103 was as its MCU, and data acquisition was through SDIO interface.Secondly, waveform data were sent to decoder VS1053 through SPI bus,and 16 bits analog data came out.Lastly,power and programmable gain amplifier was used to control fre-quency and amplitude.This new signal generator has the advantages that the output is random waveform and the amplitude-frequen-cy can be controlled.