Seyfarth Shaw LLP
Method in the design for a power supply for suppressing noise and signal interference in equipment
A new method in the design for an electronic power supply for suppressing signal interference in equipment of an electronic system due to ground current in a ground loop is provided. In a power supply comprising a transformer, a primary circuit, a secondary circuit, and ground conductors, the method is done by connecting the common signal references of secondary side to the ground conductors through a capacitor and an inductor connected in series. The added capacitor is to reject DC and low frequency noise and interference, and the added inductor is to reject high frequency noise and interference. Most noise and interference signals therefore cannot pass through the formed paths. As a result, the degree of signal interference problem is greatly reduced.
Arima Computer Corporation
H H
H02M H02M
inventional additional
Chung-Hsing
Chang