Identification of the electronic equipment´s power-on characteristics based on the bus voltage ripple data

The research method of identification of the electronic equipment´s power-on characteristics based on the data of bus voltage ripple is introduced. The main purpose is to achieve the recognition of the equipment´s power-on characteristics through a certain algorithm design, and provide reference for the follow-up intelligent applications of the bus-ripple-tester. Two methods are used here. One is frequency spectrum analysis based on the collected signals. Due to the differences of spectrum distribution between these equipment´s signals collected before and after their power-on time, the frequency band of each equipment´s characteristic distribution is different, which make it possible to achieve the purpose of identification. The other is the time-frequency analysis based on wavelet transform. According to the difference of wavelet energy of the equipment´s signals collected before and after their power-on time, the equipment can be recognized.