Amplitude-quantization spurs in direct digital frequency synthesizers in absence of phase truncation;

Analysis and Design of the Spurs in the Multiple-loop Small Step Size Synthesizer;

Design of a Charge Pump for Low-Spur Phase Locked-Loops

Precise Analysis of the Spurious Spectrum of DDS in the Presence of Phase Truncation;

The Influence of DDS Spurious Effects on Stepped-Frequency Radar s Performance;

During RF and microwave measurement, especially spurious signal spectrum test, some spurious signal maybe caused bythe spectrum analyzer itself, and displayed on the screen.

This paper introduces a frequency source with low phase-noise and low spurs and the performance of the system.

This paper illuminates theory, structure, spectrum distribution, merits and defects, especially spurs of Direct Digital Synthesis(DDS), and it then introduces Phase Locked Loop (PLL) theory.

Based on these key points, this thesis designs a radar transceiver in millimeter wave band, with low phase noise, low spurs and high frequency-switching speed.

Then,a new DDS structure for eliminating spurious signal caused by phase truncation error is introduced.

Simulating first order stray light of FY-2 VISSR using templates;

Data structure of stray light analysis in systems including diffraction components and ghosts analysis;

Detecting the sensitivity and stray light of spectrophotometer;

Corrosion reasons of stray current during metal anode electrolyzers running;

Research on distribution rule of the stray current in the pits;

Design of reducing corrosion to electrolysis system by reduction in stray current;