The classification, according to the semiconductor manufacturing technology can be divided into: integrated circuits, discrete device, photoelectric semiconductor, logic IC, analog IC, storage and other categories, generally these will be divided into small classes. And in application field, the design method for classification, although not commonly used, but according to the IC, LSI, VLSI (very large LSI) and its size classification method. In addition, according to the processing of signal, can be divided into analog, digital and analog to digital composite and functional classification method.
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