Flying-Adder Based Frequency Synthesizer –Implementation and Measurement

• Main Authors: Pao-lung Chang, 張寶隆
• Other Authors: Pao-Lung Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/11851109326360257103

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程研究所 === 100 === The applications of frequency synthesizer have been increased due to industry development. The frequency synthesizers can be applied in communication systems, such as the frequency of the clock restored clock synchronization, spread spectrum communication system. This paper uses the single path structure of Flying-Adder that was proposed by Hugh Mair and Liming Xiu. We also implement the two-path structure of Flying-Adder. Finally, we use Verilog language to design and then port to FPGA Spartan3 board. The FPGA board produces the 16 different phases with the same frequency as the input signals for Flying-Adder. We measured the output frequency with digital oscilloscope from FPGA Spartan3 board, then we compared with the theoretical formula. In addition, the modified structure of Flying-Adder by Liming Xiu in 2009, we use the spectrum analyzer to measure the output signal. The noise of output signal has been improved.