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In this paper, the video information camouflage processing method based on the pulse amplitude modulation was studied aim at the electromagnetic characteristic of computer video information. Camouflage information modulation function was proposed, the matching vision relation between character information and background color was determined, and the image fusion processing algorithm of camouflage...
High switching frequency, high resolution digital pulse-width modulator (DPWM) is one of major challenges in the implementation of digital-controlled power converters, especially in the voltage regulator (VR) application. This paper proposes three different digital duty cycle modulation schemes to improve the resolution. Almost 10 times improvement on resolution can be achieved in the voltage regulator...
To investigate the high-frequency behaviors for the switching converters, the modeling and analysis should include the influences from the sideband components, which are generated by the converter's nonlinearities. With a buck converter, two non- linearities are identified in this paper: the pulse-width modulator and the switches. Based on the harmonic-balance approach, the multifrequency model is...
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