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According to the rational function approximation method of Gaussian filter, the transfer function of an 8-order approximation filter is obtained. Based on value of the quality factor Q of the pole of the transfer function, analog cascade circuits are determined. The optimal cascading sequence and the principle of components are given. When selecting the(More)
The etching effect on the surface and electrical characteristics of high Al mole fraction Al<inf>x</inf>Ga<inf>1&#x2212;x</inf>N (x=0.65) was characterized by X-ray photoelectron spectroscopy(XPS) and transfer length method (TLM). The measured inductively coupled plasma (ICP) etching rates increased with the increasing RF power. XPS results show the Ga3d(More)
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