ESD (Electro-Static Discharge) protection circuit of high-frequency signal port and power management system

An ESD protection and high-frequency signal technology, which is applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve the problem that the ESD protection circuit has small capacitance requirements and is difficult to meet, etc. problems, to achieve the effect of high performance, low cost and wide application range

Inactive Publication Date: 2021-06-18
深圳市金誉半导体股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the improvement of communication speed, the capacitance requirements for ESD protection circuits in ultra-high-speed signal transmission ports such as USB3. meet this requirement

Method used

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  • ESD (Electro-Static Discharge) protection circuit of high-frequency signal port and power management system
  • ESD (Electro-Static Discharge) protection circuit of high-frequency signal port and power management system
  • ESD (Electro-Static Discharge) protection circuit of high-frequency signal port and power management system

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar...

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Abstract

The invention discloses an ESD (Electro-Static Discharge) protection circuit of a high-frequency signal port. The circuit comprises an ESD protection circuit, a power supply end and a grounding end, wherein the ESD protection circuit is connected to the power supply end and the grounding end, the ESD protection circuit comprises a first diode group, a port group, a second diode group, a clamping unit and a third diode group, a cathode of the first diode group is connected with the power supply end, an anode of the first diode group is connected with one end of the port group, the other end of the port group is connected with the cathode of the second diode group, the anode of the second diode group is connected with the cathode of the third diode group, the anode of the third diode group is connected with the anode of the clamping unit, and a cathode of the third diode group is connected with the grounding end; a cathode of the clamping unit is connected with the power end, the number of the first diode sets, the number of the second diode sets and the number of the port sets are the same, and the third diode set comprises at least two diodes. The circuit is advantaged in that capacitance between IO ports can be reduced, the application range is wide, and the area of circuit design is not additionally increased.

Description

technical field [0001] The invention relates to an RSD protection circuit, in particular to an ESD protection circuit of a high-frequency signal port and a power management system. Background technique [0002] The ESD protection circuit is a clamp overvoltage protection circuit, which can discharge static electricity in a short period of time, and at the same time fix the surge voltage at a relatively low voltage level, so that the back-end integrated circuits are protected from excessive surge voltage impact to avoid damage. ESD protection circuits are mainly used in various interface circuits, such as mobile phones, tablets, TVs, and computer hosts. After the surge voltage enters from the IO terminal of the circuit, it will trigger the ESD protection circuit to be turned on preferentially, and the surge current will be released to the ground through the ESD protection circuit, clamping the surge voltage at a lower level, thus protecting the back-end IC devices. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/04
Inventor 林河北梅小杰覃尚育张泽清葛立志
Owner 深圳市金誉半导体股份有限公司
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