A power filter device

A power filter and power line technology, which is applied in the field of information security, can solve the problems of power line signal attenuation, leakage, and inability to attenuate screen information, etc., and achieve the effect of improving safety and good filtering performance
CN107276377BActive Publication Date: 2019-10-29ๆŽ็‘žๅณฐ +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ๆŽ็‘žๅณฐ
Publication Date
2019-10-29

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Abstract

The invention discloses a power filter device which specifically includes a PCB, an input end high-frequency filter circuit, a primary differential mode filter circuit, a primary common mode filter circuit, a secondary common mode filter circuit, a secondary differential mode filter circuit, and an output end high-frequency filter circuit. The input end high-frequency filter circuit, the primary differential mode filter circuit, the primary common mode filter circuit, the secondary common mode filter circuit, the secondary differential mode filter circuit and the output end high-frequency filter circuit are welded onto the PCB. The power filter device is connected in series in a power line. Transmission of computer screen information along the power line is restrained, and the safety of information is improved.
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Description

technical field

[0001] The invention relates to the technical field of information security, in particular to a power filter device. Background technique

[0002] Computers and their network systems are key and important components of various electronic devices. Information attack and information interception of computer system are important ways of computer system leakage. TEMPEST (Transient Electromagnetic Pulse Emanation Surveillance Technology) technology is an extremely important project jointly researched and developed by the US National Security Agency and the Department of Defense. Its research contents mainly include: electromagnetic leakage mechanism of information processing equipment, protection technology of information radiation leakage, extraction technology of useful information, testing technology and standards.

[0003] The main purpose of TEMPEST technology is to reduce the leakage of information in the computer. One way to suppress information leakage ...

Claims

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