Broadband Frequency-hopping Source Design

With modern electronic technology, a variety of sophisticated electronic systems are the performance indicators continued to improve, in this environment, the system for restricting the frequency of performance indicators to improve the performance of the source of more and more attention. A variety of sophisticated electronic systems for the frequency of the source of the performance indicators do not require the same, but in the design of the frequency of the source of the indicators in these areas are the main considerations: the output frequency range, the output frequency signal of the phase noise, spurious, harmonics and so on. Modern frequency PLL and DDS source to the main two. In this paper, the main task is to design a broadband source of frequency hopping in order to achieve phase-locked loop structure.Paper first introduced the development process of the frequency source, and there are a variety of frequency source for a simple design method of the description and comparison, and this article describes the main elements of the study. And then introduced the modern frequency sources used by the basic structure of phase-locked loop and phase-locked loop system in each device the impact of noise on the system, but also on the phase-locked loop frequency source of the stray may be a brief analysis.Finally, this paper describes the design of projects undertaken by the frequency source to the target, in accordance with the requirements of these indicators and the above analysis to determine design, and then design programs based on the indicators and the issue of device selection and the completion of a frequency source Synthesis of the actual circuit design and PCB drawing specific and overall commissioning work, the final test results are given, the subject of performance indicators to achieve the target, the smooth delivery of products.