Open AccessDesign of Function Signal Generator Based on DDFS
Author(s) -
Meimei Lv,
Bin Zhang,
Mengnan Li,
Dapeng Shen
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1544/1/012107
Subject(s) - waveform , signal generator , field programmable gate array , direct digital synthesizer , microcontroller , function generator , signal (programming language) , arbitrary waveform generator , computer science , generator (circuit theory) , filter (signal processing) , electronic engineering , interface (matter) , power (physics) , computer hardware , electrical engineering , engineering , chip , phase locked loop , voltage , frequency synthesizer , physics , jitter , bubble , quantum mechanics , maximum bubble pressure method , parallel computing , programming language
The system is designed to construct a Function Signal Generator based on Direct Digital Frequency Synthesis Technology (DDFS), in which MCU and FPGA are the key components and necessary peripheral circuits are provided. Its main modules are responsible for the formation of oscillogram, the frequency synthesis, the digital-to-analog transformation, the control of range, and back-stage treatment, the user interface and other necessary modules. MCU controls FPGA to generate the oscillogram and other control words, and the FPGA controls output waveform and frequency synthesis. Amplitude control is realized by 2 DA. Low-pass filter and Transistor push-pull power amplification circuit are used to increase the quality of the output waveform and its loading capacity, and display the signal on the LCD. The system constitutes of 2 DAC and the FPGA, so that realizes the expanded requirements of 1 Hz-1MHz of the four waveform output.