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Anti- radiation phase-locked loop design

Author: XuXiaoLiang
Tutor: ZengZhiYi
School: University of Electronic Science and Technology
Course: Microelectronics and Solid State Electronics
Keywords: Phase-locked loop Parameter design Anti-radiation Voltage Controlled Oscillator Noise Shake
CLC: TN911.8
Type: Master's thesis
Year: 2011
Downloads: 85
Quote: 0
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Abstract

The phase-locked loop technology is a closed-loop automatic control system to track the input signal phase, first proposed in 1932 by DeBellescize in phase-locked loop technology in 1947, the first application of the actual product. Due to the technical complexity and higher cost, phase-locked loop applications in the field of aerospace. To design a high-performance PLL to be a trade-off between the number of parameters, repeatedly, increasing precision phase-locked loop circuit gave indicators put forward higher requirements. Phase-locked loop widely used in the space environment is not calm, but perilous. According to the domestic and international aerospace accident statistics show: about 40% of the fault from space radiation and anti-radiation technology imperative, and become the focus of the field of aerospace electronics and hot. In response to these problems, the paper, starting from the basic principle of the charge pump, propose a new set of parameters, improve and perfect the traditional circuit and use a simple digital circuit instead of complex analog circuit charge pump anti-radiation characteristics. The main contents include the following: (1) a detailed study of the circuit schematic of the charge pump PLL loop transfer function. The original proposed a novel parameter design method to achieve fast and effective set of the loop parameters the purpose, in order to effectively guide the subsequent module design. (2) self-biased PLL circuit to improve their work. On the basis of the understanding of circuit, the basic PLL reasonable customized parameter applied to the output frequency range is extended since the offset PLL. And make reasonable improvements on the basis of the original circuit, system indicators. (3) The phase-locked loop random jitter studies. Analysis the PLL noise function for each module, as well as the influence of the phase noise of the output. The research phase transformation relations between noise and jitter, random jitter values ??derived from the various modules of the noise output of the system. (4) different modules with different anti-radiation design. Study concluded space radiation sources as well as the differential impact on the circuit, different circuits using different means of reinforcement. A charge pump circuit, it is proposed a simple digital control filter isolation circuit, can reach the level of the anti-radiation of the classic circuit. (5) layout. Placement and routing key consideration in the design of the voltage-controlled oscillator to ensure that this key modules to work properly. The research territory principle of anti-radiation, anti-radiation design layout territory, improve radiation resistance.

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