TWM525018U - Lightning proof and noise filtering circuit for network signal - Google Patents

Description

Lightning protection and noise filtering circuit for network signal

The present invention provides a lightning protection and noise filtering circuit for network signals, especially for network signals transmitted by the network signal processing circuit, including noise filtering, and eliminating lightning surges, high voltages and surges, etc. To achieve the purpose of eliminating noise or high voltage, surge, etc. of the network signal.

According to the rapid development of computer technology today, desktop computers or notebook computers have been widely used in every corner of the society, and their computer development trend is also moving toward the direction of computing power, speed and small size. Road communication technology is also rapidly developing and bringing people's life, study, work and leisure into a new realm that is different from the past, enabling people to transmit the required instant information through network communication. Advertising or mailing, etc., while searching for various information, instant messaging or online games through the Internet, the relationship between people and the Internet is more intense and inseparable.

The part of the network is to use two methods: cable connection and wireless transmission. The cable connection technology needs to be equipped with a network connector. As the network is used more and more, the data transmitted on the network is transmitted. The capacity is also getting bigger and bigger. Network manufacturers have been increasing the speed of network transmission in order to meet the needs of users, from 10Mbps to 100Mbps or 1Gbps, and even the current fiber-optic network transmission speed can reach 10Gbps or more. However, when the network signal line is affected by lightning strikes, the network connector connected to the network signal line receives the instantaneous high voltage signal of the lightning strike, and the electronic components and the network electrically connected to the processing circuit are caused by the instantaneous high voltage. Damage to the chip, etc., in addition to affecting the unstable, interrupted or completely unreachable transmission of the incoming signal, or even causing the circuit board or electronic device (such as a computer or sharer) hosted on the network chip to be instantaneously high. The impact of voltage is faulty or damaged. The type of general network can be roughly classified into regional network, metro network, wide area network, wireless network, internet road, etc. according to the geographical scope covered by the computer. When the connection, uploading, downloading, etc. of the road signal is easy to be interfered by the noise of the surrounding electronic components, electromagnetic waves, etc., all of which will affect the instability of the network signal transmission, the filter component must be set in the network connector. , lightning protection device and signal coupling device, etc., for signal filtering and lightning protection, the high voltage can be generated, and the noise can be reduced. Opposing anti-electromagnetic interference or high voltage transient lightning, surge, etc..

Therefore, how to solve the problem that the network connector is subjected to lightning strikes to generate instantaneous high voltage, causing damage to the network chip or electronic device, or the network signal is interfered with by external electromagnetic waves, noise, etc., and causes network signals. The troubles and troubles of poor transmission quality, interruption of transmission content or inability to connect are the directions that those who are engaged in this industry want to improve.

Therefore, in view of the above-mentioned problems and deficiencies, the creators have collected relevant information, evaluated and considered them through multiple parties, and through years of experience in the industry, through continuous trial and modification, they have designed to transmit signals for network signals. The birth of a new type of patent for lightning protection and noise filtering circuits for network signals that are stable for network signal transmission, including electromagnetic waves (EMI) or noise interference.

The main purpose of the creation is that the lightning protection and noise filtering circuit is electrically connected to the network chip and the network connector by using the network signal processing circuit, and the processing circuit is the network chip and the network connector. A plurality of circuit channels are disposed between the circuit blocks, and capacitors and autotransformers are electrically connected to one or more circuit channels, and the plurality of autotransformers are respectively wound on the iron core with two sets of coils respectively a winding, wherein one set of coil windings comprises a first coil winding and a second coil winding to form a common mode inductor unit, and the other set of coil windings comprises a third coil winding and a fourth coil winding, thereby becoming an autotransformer, and capable of Reduce the interference of network signals by electromagnetic waves or noise, and eliminate the transient high voltage and surge caused by lightning strikes, so as to stabilize the transmission of network signals.

The secondary purpose of the present invention is that the set of coil windings of the autotransformer comprises a first coil winding and a second coil winding, wherein the first coil winding and the second coil winding are electrically connected to any two adjacent circuit channels respectively. And form a common mode inductance unit having an inductance value of 90 ohms (Ω, ohms) to 1000 ohms (Ω, ohms), and the inductance value of the preferred embodiment is 800 ohms (Ω, ohms); The other coil winding of the coupling transformer includes a third coil winding and a fourth coil winding, and is electrically connected to the circuit channel of the adjacent side by the third input end of the third coil winding of the respective coupling transformer, and each third coil The third output end of the winding is electrically connected to the fourth input end of each fourth coil winding, and then the fourth output end of each fourth coil winding is electrically connected to the adjacent other side circuit channel respectively, and then respectively coupled The inductance of the transformer is between 30μH and 350μH, and the DC resistance is 0.5~2 ohms (Ω, ohms), and the sensing value of the preferred embodiment is 80μH, and the DC resistance (DCR) is 1 ohm ( Ω, ohms), and the inductive reactance value of each coupled transformer (ohm) = 2πxFxL , the parameter F is the working frequency [unit: Hertz (Hz)]; The number L is the inductance [unit: micro hertz (μH)]; π = 3.14159, the autotransformer includes an iron core having a shape of a ring or a rectangular frame, and can be wound around a rectangular frame-shaped iron core. The first coil winding, the second coil winding, the third coil winding and the fourth coil winding of the two sets of coil windings on the side; the other processing circuit is electrically connected to each circuit channel between the adjacent network chip and the respective coupling transformer The capacitors in series have a capacitance value of 0.1 μF in the preferred embodiment of each capacitor.

Another purpose of the present invention is that the network chip and the processing circuit for the lightning protection of the lightning protection can be formed on the predetermined circuit board by electrical connection, and then electrically connected to the external network through the circuit board. a circuit connector; or a network connector and a processing circuit are electrically connected to the circuit board, and then electrically connected to the external network chip by the circuit board; and the set of coil windings of the autotransformer The first wire winding and the second coil winding are electrically connected to each of the adjacent two circuit paths through a circuit layout on the preset circuit board; and the third coil winding of the other coil winding of the autotransformer is The third input end is electrically connected to the adjacent circuit channel through a circuit layout on the preset circuit board, and the third output end of the third coil winding is electrically connected to the fourth through the circuit layout of the preset circuit board. The fourth input end of the coil winding is electrically connected to the ground side by a preset circuit board preset circuit layout, and the fourth output end of the fourth coil winding is electrically connected to the other through a circuit layout of the preset circuit board. Side adjacent electricity aisle.

Another object of the present invention is that the plurality of autotransformers are respectively wound on the iron core with two sets of coil windings, wherein one set of coil windings includes a first coil winding and a second coil winding to form a common mode inductor unit. The other coil winding includes the third coil winding and the fourth coil winding, which becomes an autotransformer, and the common mode inductor unit and the autotransformer share the same core, thereby reducing the manufacturing cost and facilitating the autotransformer. a group assembled in a processing circuit or More than one set of circuit channels can shorten the processing time, save time and labor, and more economical.

1‧‧‧Network Chip

11‧‧‧Feet set

111‧‧‧ pins

2‧‧‧Network connector

21‧‧‧Terminal group

211‧‧‧ terminal feet

3‧‧‧Processing circuit

31‧‧‧ Circuit Channel

32‧‧‧Signal coupling capacitor

4‧‧‧Autotransformer

41‧‧‧ iron core

42‧‧‧ coil winding

420‧‧‧Common mode inductance unit

421‧‧‧First coil winding

4211‧‧‧ first input

4212‧‧‧ first output

422‧‧‧second coil winding

4221‧‧‧second input

4222‧‧‧second output

43‧‧‧ coil winding

431‧‧‧third coil winding

4311‧‧‧ third input

4312‧‧‧ third output

432‧‧‧fourth coil winding

4321‧‧‧ fourth input

4322‧‧‧ fourth output

44‧‧‧ Grounding side

5‧‧‧Circuit board

The first diagram is a circuit block diagram of the creation.

The second picture is a simplified circuit diagram of the creation.

The third figure is a circuit block diagram of the preferred embodiment of the present invention.

The fourth figure is a circuit diagram of the authoring autotransformer.

In order to achieve the above objectives and effects, the technical means used in the creation, its construction, the method of implementation, etc., are described in detail in the preferred embodiment of the present invention, and the features and functions are as follows.

Please refer to the first, second, third and fourth figures for the circuit block diagram, simple circuit diagram, circuit block diagram of the preferred embodiment, and circuit diagram of the autotransformer. It can be clearly seen from the figure. The lightning protection and noise filtering circuit of the creation network signal comprises a network chip 1, a network connector 2 and a processing circuit 3, wherein: the network chip 1 has a connection for transmitting electronic/voltage signals. The circuit group 2 has a terminal group 21 for transmitting electronic/voltage signals, and is electrically connected to the processing circuit 3 between the pin group 11 and the terminal group 21, and the processing circuit 3 includes a group. Or one or more circuit channels 31, wherein each circuit channel 31 is electrically connected with a signal coupling capacitor 32, and between the network connector 2 and the signal coupling capacitor 32, one or more circuit channels 31, which are electrically connected to the autotransformer 4 in parallel, respectively The coupling transformer 4 is wound on the iron core 41 to wind two coil windings 42, 43. One set of coil windings 42 includes a first coil winding 421 and a second coil winding 422, and the first coil winding 421 is connected to the first input end. (A+) 4211, the first output end (A-) 4212 is electrically connected in series to the adjacent circuit channel 31, and the second coil winding 422 is connected to the second input end (B+) 4221 and the second output end ( B-) 4222 is electrically connected in series to another adjacent circuit channel 31, and the first coil winding 421 and the second coil winding 422 are electrically connected to any two adjacent circuit channels 31 to form a common mode. The inductor unit 420; the other coil winding 43 includes a third coil winding 431 and a fourth coil winding 432, and the third input end 4311 (A+) of the third coil winding 431 of the coil winding 43 is electrically connected to the phase. The adjacent circuit channel 31 and the third output end 4312 (A-) of the third coil winding 431 are electrically connected to the fourth input end 4321 (B+) of the fourth coil winding 432, and are electrically connected to the ground side 44. And the fourth output end 4322 (B-) of the fourth coil winding 432 is electrically connected to the adjacent another circuit channel 31 to form The circuit of the autotransformer 4; the autotransformer 4 is wound on the iron core 41 while winding two sets of coil windings 42, and one set of coil windings 42 constitutes a common mode inductor unit 420, and the other set of coil windings 43 constitutes a self. The circuit of the transformer 4 is coupled to achieve the purpose of sharing the same core 41 with the common mode inductor unit 420 and the autotransformer 4 to reduce the cost of manufacturing the common mode inductor unit 420 and the autotransformer 4, and to facilitate assembly of the autotransformer 4. At one or more sets of circuit channels 31 of the processing circuit 3, the processing time, time and labor saving, and economic efficiency can be shortened.

The network chip 1 and the processing circuit 3 of the above network signal can be electrically connected, formed on the circuit board 5, and then transmitted through the circuit board 5 and the external network connector 2 Electrical connection; the network connector 2 and the processing circuit 3 can also be electrically connected to the circuit board 5, and then electrically connected to the external network chip 1 by the circuit board 5; The board 5 provides power required for circuits such as the network chip 1, the network connector 2, and the processing circuit 3, and the circuit board 5 can be provided with a power supply (eg, a dry battery, a rechargeable battery, a lithium battery, or a button type battery, etc.) Or, the power supply of the external power supply is electrically connected to the power supply of the external power supply, etc., but the network chip 1, the network connector 2, and the configuration are conventional techniques, and detailed details are detailed. The construction is not the main point of the case, so it will not be described.

In addition, the processing circuit 3 is electrically connected to each pin 111 of the pin group 11 of the network chip 1 by using one end of each circuit channel 31 (each pin 111 can be MD0+, MD0-, MD1+, MD1+, respectively). MD2+, MD2-, MD3+, and MX3- are only numbers that are distinguished by each pin 111. Each number can still be changed according to actual design requirements, which is not limited to the patent scope of the present invention); and the processing circuit 3 utilizes each circuit channel. The other end of the 31 is electrically connected to each terminal pin 211 of the terminal group 21 of the network connector 2 (each terminal pin 211 can be MX0+, MX0-, MX1+, MX1-, MX2+, MX2-, MX3+, and MD3, respectively). -, only as the number of each terminal pin 211, the number can be changed according to the actual design requirements, which is not limited to the scope of the patent.

Furthermore, the respective coupling transformers 4 can wind two sets of coil windings 42 and 43 on the iron core 41, and the first coil winding 421 and the second coil winding 422 of one of the coil windings 42 can be first. The coil winding 421 is electrically connected to the adjacent circuit channel 31 by a first input end (A+) 4211 and a first output end (A-) 4212 through a predetermined circuit layout on the circuit board 5, and the second coil winding 422 is With a second input ( B+) 4221, the second output terminal (B-) 4222 is also electrically connected to another adjacent circuit channel 31 by using a preset circuit layout on the circuit board 5, and the first coil winding 421 and the second coil winding 422 are respectively provided. The common mode inductor unit 420 is formed by a predetermined circuit layout on the circuit board 5 and electrically connected to any two adjacent circuit channels 31. The inductance value of the common mode inductor unit 420 is 90 ohms (Ω, ohms). Between ~1000 ohms (Ω, ohms), and according to the network signal processing circuit 3 circuit channel 31 transmission network signal, the noise of the various signals is different, then the common mode inductance unit 420 The inductance value of the preferred embodiment may be 800 ohms (Ω, ohms); and during the signal transmission of each circuit channel 31 of the processing circuit 3, other signals enter to generate electromagnetic waves (EMI) or noise (niose) and the like. If the situation occurs, the common-mode inductor unit 420 can be used with an inductance value of about 800 ohms ((Ω, ohms). However, in practical applications, the inductance value can be adjusted according to actual needs or circuit design. Improve the stability of high-frequency network signal transmission], then each circuit The signal frequency band (CISPR22_CLASS-B, 125MHz) and the octave band transmitted in channel 31 will have higher intensity (dB) harmonics (such as 250MHz, 375MHz, 500MHz, 625MHz, 750MHz, etc.). However, it does not exceed the limit range of -4 dB, and causes electromagnetic waves (EMI) or noise (noise) to pass, and can effectively filter out interference such as electromagnetic waves or noise; and the first coil winding 421 of the second coil winding 42 An input terminal 4211 (A+) is electrically connected to the adjacent circuit channel 31, and the first output terminal 4212 (A-) of the first coil winding 421 is electrically connected to the predetermined circuit layout on the transparent circuit board 5. The second input end 4221 (B+) of the second coil winding 422 is electrically connected to the ground side 44 by a predetermined circuit layout of the circuit board 5, and is second. The second output end 4222 (B-) of the coil winding 422 is electrically connected to the adjacent another circuit channel 31 by a predetermined circuit layout of the circuit board 5 for the third coil winding 431 of the coil winding 43 The four-coil winding 432 forms a loop of the autotransformer 4 in conjunction with the predetermined line layout of the circuit board 5.

The plurality of autotransformers 4 are respectively composed of a third coil winding 431 and a fourth coil winding 432 of the coil winding 43 and each having a low resistance value (about 0.1 Ω to 10 Ω), and a lightning strike impact. The instantaneous high voltage generated can reach several KV (仟V), and the sudden high voltage, surge, etc. of the lightning strike can be transmitted to the respective coupling transformer 4 via the circuit channel 31, that is, through the third coil of the autotransformer 4. The winding 431 and the fourth coil winding 432 are wound on the iron core 41 in a series connection manner, and the instantaneous high voltage is transmitted to the ground side 44, and the voltage is stepped down and buffered, and the circuit paths 31 are respectively connected by the transformer 4. The network signal in the middle is separated from the instantaneous high voltage, and the instantaneous high voltage and the network signal are not offset each other, and the instantaneous high voltage is transmitted to the ground side 44, so that the network signal between the circuit channels 31 is not affected. Transmission, and can provide a stable transmission network signal for each circuit channel 31, which can reduce the transient high voltage of the lightning strike to form an unstable or interrupted transmission network signal, and does not cause damage to the network system, and then The network is simulated by a lightning strike generator to detect the data. The DC filter circuit currently used in the network line can be used to filter out DC and low frequency noise, and the DC and low frequency are mixed. Signals such as static electricity or lightning strikes are short-lived and low-frequency signals. As for static waves or lightning strikes, the amplitude is about several volts and the frequency is about 1 kHz. 1MHz, the voltage rise time (Rise Time) is about 1~10 microseconds (μs), and the network is electrically connected. For high-speed transmission of electrical connectors, the transmission rate mostly falls from 10Mb/s to 1Gb/s, and the corresponding transmission signal frequency ranges from 2.5MHz to 125MHz, both far exceeding 1MHz. Therefore, the DC high-pass filter circuit can be set. A frequency threshold value, for example, 1 MHz, and only the signal whose frequency exceeds the threshold value passes, the low frequency signal can be filtered out, and the lightning strike is generated according to the IEC 60950-4-5 standard. The generator, when using 10/700 lightning strike waveform, has an internal resistance value of about 15Ω, and the external resistance of the lightning strike generator must be equal to 25Ω. If a network route such as a network 10/100M is used, it is Eight lines are formed, each line is connected in series with eight 200Ω resistors (eight 200Ω resistors are connected in parallel to become an external 25Ω equivalent), for example, when the lightning generator generates 6KV (仟V) The voltage (low-frequency DC) is stepped down via an autotransformer 4 (which can have a resistance of 0.1 Ω to 10 Ω, and the preset preferred resistance value can be 1 Ω). The formula is: 6KV/(15+ 200+1) X1Ω (preferred transformer 4 is preferred) Set the resistance value to 1 Ω) ≒ 27.778V.

Then, the lightning strike of the network connector 2 is stepped down to 27.778V through the low resistance value of the autotransformer 4, and the remaining large voltage values (about 5.97KV) are electrically connected to the ground side 44 through the respective coupling transformers 4. Excluding, and the residual voltage value of the network processing circuit 3 after the autotransformer 4 is processed is only 27.778V, which is the voltage value that the network processing circuit 3 can withstand [the network line can withstand tens to hundreds of The voltage value of the volt (V), the network processing circuit 3 uses a 0.1μF signal coupling capacitor 32, which can withstand a voltage of about 50V], that is, the instantaneous high voltage of the network connector 2 when subjected to lightning strike, through the auto-coupling One set of coil windings 43 of the transformer 4 is a third coil winding 431, a fourth line The coil winding 432 is wound on the autotransformer 4 in series connection, and the instantaneous high voltage of the lightning strike can be stepped down and buffered, and the instantaneous high voltage enters each circuit channel of the network processing circuit 3 by the network connector 2. 31, that is, through the respective coupling transformers 4 between the circuit channels 31, the instantaneous high voltage is transmitted to the ground side 44 by the third coil winding 431 and the fourth coil winding 432, and the instantaneous high voltage and the network in each circuit channel 31 are instantaneously The signal is separated, and the respective coupling transformer 4 does not cause the network signal to be offset by the instantaneous high voltage, that is, the instantaneous high voltage is not transmitted to the pins 111 of the opposite pin group 11 of the network chip 1 to prevent lightning strikes. The instantaneous high voltage generated causes damage to the processing circuit 3 and the network chip 1 such as damage, damage, or attenuation of the network signal, and the circuit channel 31 can continue to stably transmit the network signal without causing network signal interruption. Unstable phenomena such as pauses, for smooth transmission of network signals, and improve the quality of network signal transmission.

Furthermore, the respective coupling transformers 4 are wound on the iron core 41 to wind the third coil winding 431 and the fourth coil winding 432 of one of the coil windings 43 and utilize the third input end 4311 of the third coil winding 431 (A+). The third output end 4312 (A-) of the third coil winding 431 is electrically connected to the fourth input end 4321 (B+) of the fourth coil winding 432, and is electrically connected to the adjacent circuit channel 31. Connected to the ground side 44, and the fourth output end 4322 (B-) of the fourth coil winding 432 is electrically connected to the adjacent another circuit channel 31 to form a loop of the autotransformer 4, and when processed When the circuit channel 31 of the circuit 3 is applied to the transmission of the network signal (that is, the transmission of the alternating current), the amount of induction for the autotransformer 4 may be between 40 μH and 800 μH (microhenry) depending on the different strokes (preferably The sense value of the embodiment may be 80 μH). If the equivalent impedance value is calculated according to the equivalent impedance value, the value of the autotransformer 4 may be Between 200 ohms (Ω) and 10,000 ohms (Ω), the impedance presented on the network transmission line does not affect the transmission of network signals. Generally, the network signal is 10M, 100M or The signal transmission amount such as 1G can pass through the processing circuit smoothly without causing interruption, pause or attenuation of the network signal, without being disturbed or affected by the autotransformer 4, and the inductive reactance value of the autotransformer 4 is It can be calculated by the following formula: Inductive value (ohm) = 2πxFxL

Where: the parameter F is the operating frequency [unit: Hertz (Hz)]; the reference number L is the inductance [unit: Henry (μH)], and π = 3.14159.

In the case of a network signal (high-frequency signal), its operating frequency (F) is 10,000,000 Hz, and the inductance (L) is 80 μH, and the inductance of the autotransformer 4 is calculated, then the auto-coupling The inductance value of the transformer 4 is: 2x3.14159x10,000,000x80=50, 265.44 ohms ≒50K ohms.

Through the auto-transformer when the network is subjected to lightning (low-frequency signal), the instantaneous high voltage (using 10/700 lightning strike waveform is 10μs+700μs≒1mμs≒1KHz=F), the operating frequency (F=1000Hz) The inductance of 4 (L=80μH) can be obtained as the inductive reactance value of the autotransformer 4: 2x3.14159x1,000x80=5.026544 ohms (ohms) ≒5 ohms equivalent impedance [autotransformer 4 The value can be between 200 ohms (Ω) and 10,000 ohms (Ω), and the instantaneous high voltage generated by the lightning strike can be known by the above formula, and the inductive reactance is proportional to the operating frequency and the inductance. Therefore, when the signal operating frequency is increased, the inductive reactance will also increase, but the increase in the inductive reactance will cause the signal The attenuation becomes large, so there is a lack of network disconnection or slow network transmission speed, but the coupling resistance can be effectively reduced by the coupling buffer of the autotransformer 4 (the inductance is reduced to about 5 ohms ( Ohms)], can effectively reduce the attenuation of the signal, and can prevent network signal transmission attenuation and interrupt or pause and other unstable phenomena, can avoid the interruption or suspension of network signal transmission caused by lightning strikes in each circuit channel 31 So that each circuit channel 31 can still smoothly transmit network signals without being affected by lightning strikes.

The plurality of autotransformers 4 are wound on the core 41 to wind the two coil windings 42, 43, and the first coil winding 421 and the second coil winding 422 of the coil winding 42 of the coil winding 42 form a common mode inductance unit 420; The third coil winding 431 and the fourth coil winding 432 of the group coil winding 43 constitute a loop of the autotransformer 4, and the autotransformer formed by the common mode inductor unit 420 and the other coil coil 43 formed by one coil winding 42 In order to separately perform circuit signal processing modes of different frequencies, the common mode inductance unit 420 of one set of coil windings 42 is filtered by external electromagnetic waves or noises for the high frequency network signal, and the other set of coil windings 43 Then, the autotransformer 4 protects against high-frequency instantaneous high voltage, surge, and the like when the lightning strike is performed. The two sets of coil windings 42 and 43 respectively perform network signal processing in different frequency bands, and thus are on the iron core 41 of the autotransformer 4. Simultaneous winding of the two sets of coil windings 42, 43 does not cause mutual interference, conflict, etc.; the autotransformer 4 can respectively perform high frequency network signal electromagnetic waves, noise and other interference and low frequency lightning strike signals. If the high voltage, the spur wave, etc. are excluded, the network signal processing circuit 3 can achieve the purpose of multiple protection effects such as external high voltage, surge, and the like due to external noise, electromagnetic waves or lightning strikes, so that the network connector 2 receives After the external network signal, the auto-transformer 4 and the signal coupling capacitor 32 of the processing circuit 3 perform lightning protection and noise filtering of the network signal, and transmit the stable network signal to the network chip 1 To ensure that network signal transmission is not easy to interrupt or pause, so that the network signal application is smoother and the quality of network signal transmission can be improved.

Therefore, the above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the creation, the lightning protection and noise filtering circuit of the creation network signal is connected to the network chip 1 and the network. The circuit connectors 2 are electrically connected by the processing circuit 3, and the signal coupling capacitors 32 are respectively connected to the circuit circuits 31, and are respectively electrically connected between a group or a group of adjacent circuit channels 31 of the processing circuit 3. An autotransformer 4 is connected. The autotransformer 4 winds two sets of coil windings 42, 43 on the iron core 41, and forms a common mode inductance unit 420 through a set of coil windings 42 to receive the network connector 2. The electromagnetic wave (EMI) or noise contained in the network signal is filtered through the ground side 44 of the respective coupling transformer 4, and the other coil winding 43 constitutes an autotransformer 4 circuit to eliminate lightning strikes. When a high voltage, a surge or the like is instantaneous, the circuit channel 31 of the processing circuit 3 can be prevented from being disturbed by lightning and noise, and the network signal can be stably transmitted, and external electromagnetic waves or noise can be stably suppressed, and Can reduce network chip 1, circuit channel 31 and The function of the high-voltage, glitch or electromagnetic wave, noise, etc., which are affected by lightning, such as lightning, and avoids the dry processing of the network processing circuit 3 due to lightning strikes, electromagnetic waves, noise, etc., and utilizes the common mode inductance unit 420 and The mode in which the autotransformer 4 shares the same core 41 can reduce the manufacturing cost, and the information that affects the network signal is unstable or does not meet the requirements of the detection regulations, so the structure and device that can achieve the aforementioned effects should be subject to the creation. All such modifications and equivalent structural changes shall be included in the scope of the patent of this creation and shall be combined with Chen Ming.

Therefore, this design is mainly designed for the lightning protection device of the network signal processing circuit, which uses the network chip and the network connector to electrically connect the processing circuit, and is everywhere Each circuit channel of the circuit is electrically connected to the signal coupling capacitor, and then electrically connected to the autotransformer, and the autotransformer is wound on the iron core to wind two sets of coil windings, and a set of coil windings constitute a common mode inductance unit, The other set of coil windings constitutes the loop of the autotransformer, and the instantaneous high voltage generated by the lightning reception of the network signal and the electromagnetic noise of the network signal are filtered out as the main protection focus to prevent the instantaneous high voltage. Causes impact and damage to network chips or related electronic components, and avoids interference from electromagnetic noise. It only allows network signals to avoid the impact of lightning and noise, and is available for network signals. The application is smoother, the data transmission is not interrupted or suspended, and the common mode inductor unit and the autotransformer share the same core, which can reduce the manufacturing cost. However, the above description is only a preferred embodiment of the present invention. Therefore, it is not limited to the scope of patents of this creation. Therefore, any simple modification and equivalent structural changes that are made by using this creation manual and the contents of the drawings should be Li included within the scope of the present writing, the engagement to Chen.

In summary, the lightning protection and noise filtering circuit of the above-mentioned network signal processing circuit is actually implemented and implemented, so as to achieve its efficacy and purpose, the creation is excellent in practicality. R&D, in order to meet the application requirements of the new patent, 提出 apply in accordance with the law, and hope that the trial committee will grant the case as soon as possible to protect the creators' hard work in R&D and creation. If there is any doubt in the ruling committee, please do not hesitate to give instructions. When you try your best to cooperate, you will feel good.

1‧‧‧Network Chip

11‧‧‧Feet set

111‧‧‧ pins

2‧‧‧Network connector

21‧‧‧Terminal group

211‧‧‧ terminal feet

3‧‧‧Processing circuit

31‧‧‧ Circuit Channel

32‧‧‧Signal coupling capacitor

4‧‧‧Autotransformer

41‧‧‧ iron core

42‧‧‧ coil winding

420‧‧‧Common mode inductance unit

421‧‧‧First coil winding

4211‧‧‧ first input

4212‧‧‧ first output

422‧‧‧second coil winding

4221‧‧‧second input

4222‧‧‧second output

43‧‧‧ coil winding

431‧‧‧third coil winding

4311‧‧‧ third input

4312‧‧‧ third output

432‧‧‧fourth coil winding

4321‧‧‧ fourth input

4322‧‧‧ fourth output

44‧‧‧ Grounding side

Claims (8)

A lightning protection and noise filtering circuit for a network signal, comprising a network chip, a processing circuit and a network connector, wherein: the network chip comprises a pin group having a plurality of pins; the processing circuit is Electrically connected to the pin group of the network chip, and provided with one or more than one circuit channel electrically connected to the pin group, respectively, electrically connected to any two adjacent circuit channels There is an autotransformer, and the plurality of autotransformers are respectively wound with two sets of coil windings, and each of the plurality of coil windings of the coupling transformer includes a first coil winding and a second coil winding for the first coil winding and the second coil winding Electrically connected to any two adjacent circuit channels to form a common mode inductance unit having an inductance value of 90 ohms (Ω, ohms) to 1000 ohms (Ω, ohms), each of which is coupled to another set of coil windings of the transformer a third coil winding, a fourth coil winding, and a third input end of the third coil winding of each coupled transformer is electrically connected to the circuit channel of the adjacent side, and the third output end of each third coil winding is respectively electrically Connected to each fourth line The fourth input end of the winding and the fourth output end of each fourth coil winding are electrically connected to the adjacent other side circuit channels respectively, and the sensing values of the respective coupling transformers are between 30μH and 350μH, and the DC resistance is The value is 0.5~2 ohms (Ω, ohms), and then the capacitors in series are electrically connected to each circuit channel between the adjacent network chip and the respective coupling transformers, and the capacitance values of the capacitors are between 0.03μF and 1.0. The network connector is electrically connected to the processing circuit, and is provided with a terminal group electrically connected to each circuit channel and having a plurality of terminal pins. For example, the lightning protection and noise filtering circuit of the network signal described in claim 1 of the patent scope, wherein The first coil winding of the one set of coil windings of the plurality of autotransformers is electrically connected to the adjacent one side circuit channel by the first input end, the first output end, and the second coil winding is the second input The terminal and the second output are electrically connected in series to the adjacent other side circuit channels. For example, the lightning protection and noise filtering circuit of the network signal described in claim 1 wherein the first coil winding and the second coil winding of the plurality of autotransformers constitute a common mode inductor unit, and the preferred implementation thereof The inductance value of the example is 800 ohms (Ω, ohms). The lightning protection and noise filtering circuit of the network signal according to claim 1, wherein the third coil winding and the fourth coil winding of the plurality of autotransformers form an inductance, and the preferred embodiment thereof The sensing value is 80μH, and the DC resistance value (DCR) is 1 ohm (Ω, ohms), and the inductive reactance value (ohm) of each coupling transformer is 2πxFxL. The parameter F is the operating frequency [unit: Hertz (Hz) 〕; the reference number L is the inductance [unit: micro hertz (μH)]; π = 3.14159. For example, in the lightning protection and noise filtering circuit of the network signal described in claim 1, wherein each adjacent circuit chip and each of the coupling transformers are electrically connected to the capacitors in series, and the capacitors are respectively connected. The preferred embodiment has a capacitance value of 0.1 μF. The anti-lightning and noise filtering circuit of the network signal according to the first aspect of the patent application, wherein the plurality of autotransformers comprise a rectangular frame-shaped iron core and are wound around each side of the rectangular frame-shaped iron core. a first coil winding, a second coil winding, a third coil winding, and a fourth coil winding of the coil winding. For example, in the lightning protection and noise filtering circuit of the network signal described in claim 1, wherein the network chip and the processing circuit are electrically connected to the preset circuit board, and then The circuit board is electrically connected to the external network connector; or the network connector and the processing circuit are electrically connected to the circuit board, and then electrically connected to the external network chip by the circuit board. For example, in the lightning protection and noise filtering circuit of the network signal described in claim 1, wherein the plurality of autotransformers have two sets of coil windings, and the first coil winding of one set of coil windings is through a preset circuit. The circuit layout on the board is electrically connected to the adjacent circuit channel, and the second coil winding is also electrically connected to the adjacent other circuit channel through the circuit layout on the preset circuit board; the third coil winding of the other coil winding is The third input end is electrically connected to one adjacent circuit channel through a circuit layout on the preset circuit board, and the third output end of the third coil winding is also electrically connected to the fourth coil through a circuit layout of the preset circuit board. After the fourth input end of the winding, the preset circuit layout of the predetermined circuit board is electrically connected to the ground side, and the fourth output end of the fourth coil winding is electrically connected to the other side through the circuit layout of the preset circuit board. Adjacent circuit channels.