Electrostatic discharge measuring device

Abstract

An electrostatic discharge measuring device is used for measuring electrostatic discharge applied to a test point of a case. The electrostatic discharge measuring device comprises a first conductive element, a resistor, a second conductive element, an attenuator and an oscilloscope. The first conductive element is coupled to the test point. The resistor is coupled to the first conductive element, and the electrostatic discharge generates a first voltage at a first end of the resistor. The second conductive element is coupled to the second end of the resistor. The attenuator can be used for converting the first voltage into a second voltage, and the attenuator is coupled to the resistor. The oscilloscope can be used for measuring the second voltage, and the oscilloscope is coupled to the attenuator. The first voltage is higher than the second voltage, and the second voltage is an electrostatic discharge corresponding to the test point.

Description

Technical Field

[0001] The present application discloses an electrostatic discharge measurement device, and more particularly, an electrostatic discharge measurement device including a resistor and an attenuator and capable of measuring electrostatic discharge. Background Art

[0002] The impact of electrostatic discharge (ESD) on electronic products is not only that the electrostatic discharge current is fed into the victim product, which may damage the victim product, but also that when electrostatic discharge occurs, the radiation noise generated by the discharge current may cause signal interference to the victim product. For example, according to the specifications defined by IEC 61000-4-2 or EN 61000-4-2 regulations, when the electrostatic discharge has a discharge of 4 kilovolts (kV), the product must be able to accept a discharge current of 15 amperes (A) within 1 nanosecond (ns), and the product must not have system function abnormalities in order to meet the regulatory requirements.

[0003] Currently, in the early stages of chassis development, the evaluation of ESD shielding effectiveness often relies on the experience of engineers. After checking the design drawings, they conduct visual discussions on the prototype chassis to evaluate possible ESD prevention and control measures, but cannot perform actual ESD measurements.

[0004] The actual measurement and evaluation of the chassis's ESD protection performance can only be performed after the system-related circuit boards' software and hardware are installed. Under such circumstances, the chassis's ESD shielding performance evaluation will be overly dependent on the engineers' experience, and will also fall into the dilemma of being forced to replace the early design with late debugging. If the chassis's ESD protection capability is not high enough in the future, it will be forced to modify the original design. Summary of the invention

[0005] The embodiment provides an electrostatic discharge measuring device for measuring the electrostatic discharge of a chassis. The chassis includes a test point. The electrostatic discharge measuring device includes a first conductive element, a resistor, a second conductive element, an attenuator and an oscilloscope. The first conductive element includes a first end and a second end, and the first end of the first conductive element is coupled to the test point. The resistor includes a first end and a second end, and the first end of the resistor is coupled to the second end of the first conductive element, wherein the first end of the resistor has a first voltage. The second conductive element includes a first end and a second end, and the second end of the second conductive element is coupled to the second end of the resistor. The attenuator includes a first end and a second end, and the first end of the attenuator is coupled to the first end of the resistor to receive the first voltage, and the attenuator adjusts the first voltage to a second voltage, and the second end of the attenuator outputs the second voltage. The oscilloscope comprises an input terminal, the input terminal of the oscilloscope is coupled to the second terminal of the attenuator, and obtains the second voltage. The first voltage is higher than the second voltage, and the second voltage corresponds to the electrostatic discharge on the test point. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of performing an electrostatic discharge test on a chassis in an embodiment;

[0007] Figure 2 is a schematic diagram of an electrostatic discharge measurement device in an embodiment;

[0008] Figure 3 is a schematic diagram of a first conductive element and a second conductive element in an embodiment;

[0009] Figure 4 is a schematic diagram of a housing of an electrostatic discharge measuring device in an embodiment;

[0010] Figure 5 2 is a diagram showing the appearance of the housing in the embodiment.

[0011] Explanation of symbols

[0012] 100: Electrostatic discharge measurement device

[0013] 110: first conductive element

[0014] 1101,1201: First end

[0015] 1102,1202: Second end

[0016] 120: second conductive element

[0017] 130: Resistance

[0018] 140: Attenuator

[0019] 150: Oscilloscope

[0020] 150r: equivalent resistance

[0021] 180: Shell

[0022] 181: First connector

[0023] 182: Second connector

[0024] 183:Printed Circuit Board

[0025] 184: Column

[0026] 510: Electrostatic Discharge Simulator

[0027] 520: Chassis

[0028] G1: Conductive point

[0029] Iin: current

[0030] P1: Test point

[0031] V1: first voltage

[0032] V2: Second voltage

[0033] Vr: reference voltage DETAILED DESCRIPTION

[0034] Figure 1 FIG. 5 is a schematic diagram of performing an electrostatic discharge test on the chassis 520 in an embodiment. Figure 1 As shown, the ESD simulator 510 can apply an ESD electromagnetic pulse to a location to be tested on a chassis 520 to simulate ESD. The chassis 520 is, for example, a chassis of a server.

[0035] Through the connection line connected to the shell 180 of the ESD measurement device 100, the first conductive element 110 (described later) of the ESD measurement device 100 can be coupled to the test point P1 of the chassis 520, wherein the position of the test point P1 can correspond to the position where the ESD simulator 510 applies the ESD electromagnetic pulse.

[0036] The electrostatic discharge electromagnetic pulse applied by the electrostatic discharge simulator 510 at the test point P1 can generate Figure 1The first voltage V1 shown. However, if the first voltage V1 is directly measured by the oscilloscope 150 to measure the strength of the electrostatic discharge, the oscilloscope 150 may be damaged because the first voltage V1 is too high. According to an embodiment, the first voltage V1 can be adjusted to generate a lower second voltage V2, and the oscilloscope 150 can measure the second voltage V2 through a connecting line, so as to measure the impact of the electrostatic discharge according to the second voltage V2. In this way, in an embodiment, the electrostatic discharge electromagnetic pulse applied by the electrostatic discharge simulator 510 can be conveniently measured while protecting the oscilloscope 150. The relevant details will be described later.

[0037] Through the connection line connected to the housing 180 of the ESD measurement device 100, the second conductive element 120 (described later) of the ESD measurement device 100 can be coupled to the conductive point G1 of the chassis 520, wherein the conductive point G1 can have a reference voltage Vr described later, such as a ground voltage. The details of the ESD measurement device 100 of the embodiment can be described as follows. Figures 2 to 5 described.

[0038] Figure 2 1 is a schematic diagram of an electrostatic discharge measuring device 100 in an embodiment. The electrostatic discharge measuring device 100 can be used to measure electrostatic discharge (ESD) on a test point P1. The electrostatic discharge measuring device 100 can include a first conductive element 110, a resistor 130, a second conductive element 120, an attenuator 140, and an oscilloscope 150.

[0039] The first conductive element 110 may include a first end and a second end, wherein the first end of the first conductive element 110 may be coupled to the test point P1. The resistor 130 may include a first end and a second end, wherein the first end of the resistor 130 may be coupled to the second end of the first conductive element 110, and the first end of the resistor 130 may have a first voltage V1.

[0040] The second conductive element 120 may include a first end and a second end, wherein the second end of the second conductive element 120 may be coupled to the second end of the resistor 130 .

[0041] The attenuator 140 can be used to adjust the first voltage V1 to the second voltage V2. The attenuator 140 can include a first end and a second end. The first end of the attenuator 140 can be coupled to the first end of the resistor 130, and the second end of the attenuator 140 can have the second voltage V2.

[0042] The oscilloscope 150 can be used to measure the second voltage V2. The oscilloscope 150 includes an input terminal, and the input terminal of the oscilloscope 150 is coupled to the second terminal of the attenuator 140. The first voltage V1 may be higher than the second voltage V2, and the second voltage V2 may correspond to the electrostatic discharge of the test point P1. For example, when the electrostatic discharge of the test point P1 is higher, the second voltage V2 is higher.

[0043] Figure 2 In the embodiment, the value of the first voltage V1 divided by the second voltage V2 may be 20 decibels (20 dB). However, this is only an example, and the value of the first voltage V1 divided by the second voltage V2 may be other suitable values ​​according to the use requirements and the specifications of the attenuator 140. Using the attenuator 140 to convert the first voltage V1 into a lower second voltage V2 can avoid damage to the oscilloscope 150.

[0044] Figure 2 In the embodiment, the resistance value of the resistor 130 can be represented by R1, and the current flowing through the resistor 130 can be represented by Iin. Therefore, the relationship among the current, voltage and resistance value can be described as follows:

[0045] V1=Iin×R1=k×V2…eq-1

[0046] The parameter k may be a value of the first voltage V1 divided by the second voltage V2 , where k may be 20 dB, or the parameter k may be 10.

[0047] Figure 2 In the embodiment, the resistance value of the resistor 130 may be between 1 ohm and 3 ohms. For example, the resistance value of the resistor 130 may be between 1.5 ohms and 2.5 ohms. For example, the resistance value of the resistor 130 may be 2 ohms.

[0048] Figure 2 In the embodiment, the attenuator 140 may be a SubMiniature version A (SMA) attenuator. The oscilloscope 150 may be a digital storage oscilloscope (DSO) or other suitable oscilloscopes. Figure 2 As shown, the oscilloscope 150 may have an equivalent resistor 150r, and the resistance of the equivalent resistor 150r may be between 40 ohms and 60 ohms. For example, the resistance of the equivalent resistor 150r may be 50 ohms.

[0049] Figure 3 Schematic diagram of the first conductive element 110 and the second conductive element 120 in an embodiment. The first conductive element 110 may be a first alligator clip, the first end 1101 of the first conductive element 110 may be a jaw for clamping the test point P1, and the second end 1102 of the first conductive element 110 may be a conductive contact.

[0050] The first end 1201 of the second conductive element 120 can be coupled to the reference voltage terminal. The second conductive element 120 can be a second alligator clip, the first end 1201 of the second conductive element 120 can be a jaw for clamping the conductive point G1 having the reference voltage Vr, and the second end 1202 of the second conductive element 120 can be a conductive contact for providing the reference voltage Vr. For example, the reference voltage Vr can be a ground voltage, and the conductive point G1 having the reference voltage Vr can be a system ground point on the housing.

[0051] Figure 3 In the embodiment, the first alligator clip and the second alligator clip may have different colors, for example, the first conductive element 110 may be a red alligator clip, and the second conductive element 120 may be a black alligator clip, for easy distinction and operation.

[0052] Figure 4 FIG. 1 is a schematic diagram of a housing 180 of an electrostatic discharge measurement device 100 in an embodiment. Figure 4 As shown, the resistor 130 may be disposed in a housing 180 , and the housing 180 may include a first connector 181 , a second connector 182 , a printed circuit board 183 and at least one column 184 .

[0053] The first connector 181 may include a first end and a second end, wherein the first end may be coupled to the second end 1102 of the first conductive element 110 , and the second end may be coupled to the first end of the resistor 130 .

[0054] The second connector 182 includes a first end and a second end, wherein the first end is coupled to the first end of the resistor 130 , and the second end is coupled to the first end of the attenuator 140 .

[0055] The reference voltage layer (eg, ground voltage layer) of the printed circuit board 183 may be used to provide a reference voltage Vr. The reference voltage Vr may come from Figure 1 The printed circuit board 183 may be coupled to the second end of the resistor 130 , and the printed circuit board 183 may be coupled to the second end 1202 of the second conductive element 120 .

[0056] The column 184 can be used to fix the printed circuit board 183, and the column 184 can be disposed between the printed circuit board 183 and the inner plate 185 of the housing 180. For example, the column 184 can be a copper column, an aluminum column or a column made of a suitable material.

[0057] Figure 4In the embodiment, the reference voltage layer (e.g., the ground voltage layer) of the printed circuit board 183 can be electrically connected to the second end of the resistor 130 and the second end 1202 of the second conductive element 120, wherein the reference voltage layer of the printed circuit board 183, the second end of the resistor 130, and the second end 1202 of the second conductive element 120 can have a reference voltage Vr (e.g., the ground voltage).

[0058] Figure 4 In the embodiment, the attenuator 140 is placed outside the housing 180, but this is only an example. According to an embodiment, the attenuator 140 can also be placed inside the housing 180. The user can adjust the position of the attenuator 140 according to needs.

[0059] For example, Figure 4 The length, width and height of the middle housing 180 may be 60 mm, 25 mm and 25 mm respectively. Figure 4 The length and width of the middle printed circuit board 183 may be 55 mm and 20 mm respectively.

[0060] For example, Figure 4 In the embodiment, the first connector 181 may be a first sub-micro-A (SMA) connector, and the second connector 182 may be a second sub-micro-A (SMA) connector.

[0061] According to another embodiment, Figure 4 The connection line between the second connector 182 and the printed circuit board 183 can also extend from the inside of the housing 180 to the outside of the housing 180 through the first connector 181 for easy operation.

[0062] Figure 5 FIG. 1 is an appearance diagram of the housing 180 in an embodiment. Figure 5 As shown, the housing 180 may be a rectangular parallelepiped for ease of use.

[0063] In an embodiment, the server of the present invention can be used for artificial intelligence (AI) computing, edge computing, and can also be used as a 5G server, a cloud server, or an Internet of Vehicles server.

[0064] In summary, by using the electrostatic discharge measuring device 100, it is convenient to perform simulation tests on the tolerance and reliability of electrostatic discharge at various positions of the chassis 520, so that the inconvenience caused by performing electrostatic discharge tests after the electronic components (such as processors, memory, etc.) are installed in the chassis can be avoided, and the risk of damage to the electronic components can be reduced. In addition, by using the electrostatic discharge measuring device 100, the first discharge and the second discharge of electrostatic discharge can be conveniently and accurately tested for the protrusions of the chassis (such as the test point P1 mentioned above), and the damage to the oscilloscope due to excessive voltage can be avoided. Therefore, the electrostatic discharge measuring device 100 of the embodiment is really helpful in dealing with the difficult problems in the field of electrostatic discharge testing.

[0065] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An electrostatic discharge measuring device, characterized in that: The device is used to measure the electrostatic discharge of a chassis, the chassis includes a test point, and the electrostatic discharge measuring device includes: A first conductive element, comprising a first end and a second end, wherein the first end of the first conductive element is coupled to the test point; a resistor, comprising a first end and a second end, the first end of the resistor being coupled to the second end of the first conductive element, and the first end of the resistor having a first voltage; a second conductive element, comprising a first end and a second end, wherein the second end of the second conductive element is coupled to the second end of the resistor; an attenuator, comprising a first end and a second end, the first end of the attenuator being coupled to the first end of the resistor to receive the first voltage, the attenuator adjusting the first voltage to a second voltage, and the second end of the attenuator outputting the second voltage; and An oscilloscope comprising an input terminal, wherein the input terminal of the oscilloscope is coupled to the second terminal of the attenuator and obtains the second voltage; The first voltage is higher than the second voltage, and the second voltage corresponds to the electrostatic discharge on the test point.

2. The electrostatic discharge measuring device according to claim 1, characterized in that: The value of the first voltage divided by the second voltage is 20 decibels (20 dB).

3. The electrostatic discharge measuring device according to claim 1, characterized in that: A resistance value of the resistor is between 1 ohm and 3 ohms.

4. The electrostatic discharge measuring device according to claim 1, characterized in that: The oscilloscope has an equivalent resistor, and a resistance value of the equivalent resistor is between 40 ohms and 60 ohms.

5. The electrostatic discharge measuring device according to claim 1, characterized in that: The first end of the second conductive element is coupled to a reference voltage end.

6. The electrostatic discharge measuring device according to claim 1, characterized in that: The device further comprises a housing, the resistor is disposed inside the housing, and the housing comprises: a first connector, comprising a first end and a second end, the first end of the first connector being coupled to the second end of the first conductive element, and the second end of the first connector being coupled to the first end of the resistor; a second connector, comprising a first end and a second end, the first end of the second connector being coupled to the first end of the resistor, and the second end of the second connector being coupled to the first end of the attenuator; a printed circuit board, for providing a reference voltage, the printed circuit board being coupled to the second end of the resistor and the second end of the second conductive element; and A column is used to fix the printed circuit board. The column is arranged between the printed circuit board and an inner plate of the housing.

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