The Simulation and Analysis of Flying-Adder Based Frequency Synthesizer

• Main Authors: Wen-Chung Wu, 吳文忠
• Other Authors: Pao-Lung Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/15022388831068312971

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程研究所 === 100 === With the development of communications, digital television, satellite positioning, aerospace, radar and electronic warfare technology, getting higher and higher requirements on the frequency synthesizer is necessary, such as the frequency generation, clock restored, clock synchronization, spread spectrum communication system. This paper is in accordance with, Hugh Mair and Liming Xiu, the high efficiency of frequency and phase synthesizer (Flying-Adder architecture) to the circuit design in 2000[3], also known as the architecture of the flying-adder frequency synthesizer (Flying-Adder Frequency Synthesizer). We use MicroCode Company’s circuit design and simulation software - CiruitMaker 2000, using the TTL series logic IC circuit to simulate the flying-adder frequency synthesizer output waveform and spectrum. In this paper, the Flying-Adder frequency synthesizer architecture is divided into Single_path Flying_Adder and Two_path Flying_Adder, etc.. The input signals are four different phase with same frequency. The frequency control word is divided into integer and fractional parts. The modified Flying-Adder is to change the structure of the adder with an additional D-type flip-flop between each bit of the adder. This can enhance the power of frequency signal, and reduce the sub-frequency noise.