Power supply device and its designing method

Abstract

Power supplier is in use for restraining signal interference generated in electronic equipment caused by fluctuant earth current. The power supplier includes a transformer, a first side circuit, second side circuit, and grounded conductor. Through cascaded a capacitor and an inductor, the method connects the first side circuit and the second side circuit to grounded conductor. Added capacitor can filter out noise and interference in DC and low frequencies components as well as help to maintain representation of lowered electromagnetic interference. Added inductor is in use for getting rid of noise in high frequency and interference. Most part of noise and interference signal is not possible to pass through conduction route formed. The result of the grounded method is that interfere degree is reduced greatly.

Description

(1) Technical field

[0001] This invention relates to the suppression of signal interference in electronic equipment, and in particular to the use of new grounding techniques in power supplies or adapters to suppress varying ground currents (ground current) Signal interference generated in electronic equipment. (2) Background technology

[0002] Grounding is an important part of computer, electrical and electronic systems. According to the Institute of Electrical and Electronics Engineers (IEEE), grounding is defined as a conducting connection. A conductive connection, whether intentional or accidental, by which a circuit or electronic device is connected to the earth or to a relatively large conductive body. The object that replaces the surface. Grounding is used to establish and maintain the potential of the earth's surface (or this conductive object) on the conductor connected to the earth's surface (or this conductive object), or a potential similar to it, and to condu...

Images