USB (universal serial bus) interface circuit with electrostatic protection

A USB interface and electrostatic protection technology, which is applied in the electronic field, can solve problems such as electronic product damage, device damage, and circuit system damage, and achieve the effects of simple wiring, low cost, and guaranteed signal quality

Inactive Publication Date: 2013-12-25
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For commonly used interfaces such as USB, users often perform hot swapping during use, and the chips on the board are easily affected by static electricity. Static electricity is easy to be directly transmitted

Method used

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  • USB (universal serial bus) interface circuit with electrostatic protection

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0016] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0018] A USB interface circuit with electrostatic protection, comprising a first signal line, a second signal li...

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Abstract

The invention relates to the technical field of electronics, in particular to a USB interface circuit. The USB interface circuit with electrostatic protection is characterized by comprising a first signal line, a second signal line and a ground line. Electrostatic protection units are respectively arranged between the first signal line and the ground line and between the second signal line and the ground line, each electrostatic protection unit comprises two conductors, each conductor is provided with a tip, and tips of the two conductors are relatively arranged and are provided with one clearance at intervals. Compared with conventional USB electrostatic protection, the USB interface circuit is simple in wiring and low in cost, and signal quality can be guaranteed without consideration of signal attenuation on difference paths.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a USB interface circuit. Background technique [0002] The interaction between substances, such as friction, contact, induction, and conduction, causes the substance to gain or lose electrons, lose electrical balance and become charged. The accumulation of charges makes the surface of the substance charged with static electricity. When the charge accumulates to a sufficient strength, the charge It may be released, causing the surrounding substances to be broken down, so as to obtain a new electrical balance. This rapid neutralization of electrostatic charges is called Electro Static Discharge (ESD). When the resistance is generally small, it often causes instantaneous large current and damages the circuit. For some ESDS (Electrostatic Sensitive Components), it can lose its proper normal performance, or even completely lose its normal function, so ESD protection is very neces...

Claims

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Application Information

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IPC IPC(8): G06F13/40H02H9/06
Inventor 鲁灿
Owner PHICOMM (SHANGHAI) CO LTD
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