TWM573918U - Pulsed filter - Google Patents

Abstract

The present invention discloses a pulse filter comprising four first magnetic rings, four first toroidal coils, four second magnetic rings, four second toroidal coils, four second intermediate tapped connecting wires, four third magnetic rings, four The third toroidal coil, the fourth and third intermediate tapping wires, and the glue and the casing for accommodating the above components and providing isolation protection for connecting the RJ45 connector to the network integrated circuit and providing pulse filtering. In particular, the first loop coil, the second loop coil, and the third loop coil wound by the first, second, and third magnetic pairs are respectively used as a transformer, an input impedance, and an output impedance, and are specifically designed as inputs. Impedance and output impedance are impedance matching, which can greatly reduce the transmission loss and waveform distortion between the network connector and the network integrated circuit, and effectively increase the transmission distance.

Description

Pulse filter

The present invention relates to a pulse filter, in particular, using a first magnetic ring, a second magnetic ring, a third magnetic ring, and a first toroidal coil, a second toroidal coil, and a third toroidal coil, respectively. Transformer, input impedance, output impedance, and specially designed for input impedance and output impedance are impedance matching, which can greatly reduce the transmission loss and waveform distortion between the network connector and the network integrated circuit, and effectively improve the transmission distance. Ideal for RJ45 connectors for 10G-BASE-T Ethernet communication networks or 10G BASE-T network interfaces operating at 10Gbps transmission speed.

Ethernet is a very common type of network, and it is well known that PoE power is a technology that can transmit power and data to a device through a twisted pair in an Ethernet network, and is also commonly called RJ45. The 8P8C connector is a commonly used twisted pair cable plug in Ethernet. 8P8C (8 position 8 contact) 8P refers to 8 positions (Position, ie 8 grooves), and 8C refers to 8 Contact (ie, 8 metal contacts).

Taking 100 Base-T4 as an example, the RJ45 connector contains four sets of differential signal pairs, namely TD1+ pin (transmit data +), TD1-pin (transmit data -), TD2+ pin, TD2-pin, TD3+ Pin, TD3-pin, TD4+ pin, TD4-pin.

Furthermore, Fast Ethernet, 10/100M Ethernet uses only four wires and uses differential signal transmission to reduce electromagnetic interference. Two TX wires are screwed together, and two RX receiver wires are also connected. Screw together. Therefore, the parallel lines are both EIA-568-A or EIA-568-B, and the jumper is the EIA-568-A at one end and the EIA-568-B at the other end.

In addition, in Gigabit Ethernet (Gigabit Ethernet, 1000M Ethernet) or Power over Ethernet (PoE), all four pairs of differential pairs are used.

For example, as shown in the first and second figures, the RJ45 connector SK in the prior art generally uses two magnetic rings housed in the housing 10 having a plurality of pins 11 as a network filter. The first main magnetic ring 20 and the second magnetic ring 30 are respectively connected to the network integrated circuit IC to provide an isolated differential signal transmission function. Further, the first magnetic ring 20 is mainly used as a transformer, and the differential signal ratio is 1:1 for differential signal transmission, and has functions of impedance matching, waveform repair, signal clutter suppression, voltage isolation, etc., which can be increased. The transmission distance can also keep the connected network integrated circuit IC isolated from the outside, further enhancing the anti-interference ability. In addition, the second magnetic ring 30 functions as the input impedance Rin, and it is obvious that the conventional technique only has the input impedance Rin, but the output impedance is not configured. Therefore, the input impedance and the output impedance of the entire transmission interface are not The matching causes the transmission current I to become larger, increasing the transmission power, seriously affecting the actual transmission distance, and greatly limiting the application field.

In addition, although the input impedance Rin provided by the second magnetic ring 30 can effectively filter the common mode noise of the RJ45 connector SK, the high frequency noise generated by the network integrated circuit IC is filtered due to lack of high impedance. Common mode noise, causing waveform distortion and seriously affecting the transmission quality of the signal.

The means for implementing the conventional techniques can be referred to the third figure, which is a well-known technique and thus will not be described in further detail.

Therefore, there is a great need for an innovative pulse filter that includes three toroidal coils, each acting as an input impedance, a transformer, and an output impedance, all built into an insulative housing, and specifically designed to match the input impedance and output impedance. The transmission loss of the overall line is reduced to a very low level, and the transmission distance is effectively increased, thereby solving all the problems of the above-mentioned conventional technology.

The main purpose of the present invention is to provide a pulse filter comprising four first magnetic rings, four first toroidal coils, four second magnetic rings, four second toroidal coils, four second intermediate tapped connecting wires, and four third magnetic wires. The ring, the fourth third toroidal coil, the fourth and third intermediate tapping wires, and the glue and the casing for accommodating the above components and providing isolation protection can connect the RJ45 connector SK to the network integrated circuit IC and have a pulse Filtering effect.

Specifically, each of the first toroid coils is wound around a corresponding first magnetic ring to form a transformer, and each of the second toroidal coils is wound around a corresponding second magnetic ring to constitute an input impedance, and Each of the third toroidal coils is wound around a corresponding third magnetic ring to constitute an output impedance.

The housing has a plurality of pins that are coupled to the second toroidal coils and the third toroidal coils. Furthermore, each of the second center tap connection lines is connected to the corresponding pin by the center tap of the side of the first loop coil, and each of the third center tap line is the other of the first loop coil The center tap on one side is connected to the corresponding pin.

In particular, the corresponding second loop coil, the first loop coil, and the third loop coil are sequentially connected, and the network connector is connected to the network integrated circuit via the pins.

Overall, the present invention utilizes a first toroidal coil, a second toroidal coil, and a third toroidal coil that are first, second, and third magnetically coupled to serve as a transformer, an input impedance, and an output impedance, respectively. Specially designed for input impedance and output impedance is impedance matching, which can greatly reduce the transmission loss and waveform distortion between the network connector and the network integrated circuit, and effectively improve the transmission distance.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Please refer to the fourth and fifth figures, respectively, which are schematic diagrams and circuit diagrams of the pulse filter of the first embodiment. As shown in the fourth and fifth figures, the pulse filter of the first embodiment of the present invention includes a housing 10, four first magnetic rings 20, four first toroidal coils 22, four second magnetic rings 30, and four Two toroidal coils 32, four second intermediate tapped connecting wires 34, four third magnetic rings 40, four third toroidal coils 42 and four third intermediate tapped connecting wires 44 for connecting the RJ45 connector SK to the network integrated body The circuit IC has a pulse filtering function, wherein all of the first magnetic ring 20, the first toroidal coil 22, the second magnetic ring 30, the second toroidal coil 32, the second intermediate tap connection line 34, the third magnetic ring 40, The third toroidal coil 42 and the third intermediate tapped connection 44 are all housed together in the housing 10.

Preferably, the first magnetic ring 20, the second magnetic ring 30, and the third magnetic ring 40 are core magnetic rings, and the first toroidal coil 22, the second toroidal coil 32, the second intermediate tap connection line 34, and the first The three toroidal coils 42 and the third intermediate tapped connection line 44 are two-phase stranded enameled wires.

Each of the first toroidal coils 22 is wound around a corresponding first magnetic ring 20, each of the second toroidal coils 32 is wound around a corresponding second magnetic ring 30, and each of the third toroidal coils 42 is It is wound around the corresponding third magnetic ring 40, thus constituting four sets of pulse filtering units. Further, the housing 10 has a plurality of pins 11 for connecting the first toroidal coil 32, the second intermediate tapping wire 34, the third toroidal coil 42 and the third intermediate tapping wire 44.

In general, the pulse filter of the first embodiment of the present invention is disposed between the RJ45 connector SK and the network integrated circuit IC, and is connected to the RJ45 connector SK and the network integrated circuit IC via the pins 11. In order to provide pulse filtering function, the transmission loss of the whole line can be reduced, and the transmission distance can be effectively improved.

Specifically, each of the first toroidal coils 22 is wound around a corresponding first magnetic ring 20 to form a transformer, and each of the second toroidal coils 32 is wound around a corresponding second magnetic ring 30 to constitute a transformer. The impedance is input, and each of the third toroidal coils 42 is wound around the corresponding third magnetic ring 40 to form an output impedance. Therefore, the electrical signal from the RJ45 connector SK can be passed through the pins 11 . The sequence is bidirectionally transmitted to the network integrated circuit IC via the input impedance, the transformer, and the output impedance.

Further, the RJ45 connector SK mentioned in this creation is in addition to four sets of differential signal pair pins (ie, TD1+ pin, TD1-pin, TD2+ pin, TD2-pin, TD3+ pin, TD3-). In addition to the pin, TD4+ pin, and TD4-pin, the TCT1 pin, the TCT2 pin, the TCT3 pin, and the TCT4 pin are further included in each set of differential signal pair pins, as shown in the left side of the fourth figure. Shown. In addition, the right side of the fourth figure is labeled MCT1 pin, MX1-pin, MX1-pin, MCT2 pin, MX2-pin, MX2-pin, MCT3 pin, MX3 of the network integrated circuit IC. - Pin, MX3-pin, MCT4 pin, MX4-pin, MX4-pin, which correspond to the TCT1 pin, TD1+ pin, TD1- pin, TCT2 pin, TD2+ pin of RJ45 connector SK, respectively. Pin, TD2-pin, TCT3 pin, TD3+ pin, TD3- pin, TCT4 pin, TD4+ pin, TD4-pin.

More specifically, the second toroidal coil 32 is further connected between the RJ45 connector SK and the first toroidal coil 22, and the third toroidal coil 42 is further connected to the first toroidal coil 22 and the network integrated circuit Between ICs. Furthermore, the second loop coil 32 is the side (the left side in the drawing) that connects the first loop coil 22, and the third loop coil 42 is the other side that connects the first loop coil 22 (the right side in the figure) In particular, the TCT1 pin, the TCT2 pin, the TCT3 pin, and the TCT4 pin are intermediate taps connected to the left side of the first toroidal coil 22, that is, the second intermediate tap connection line 34, and are wound around Two magnetic rings 30, and the MCT1 pin, the MCT2 pin, the MCT3 pin, and the MCT4 pin are intermediate taps connected to the right side of the first toroidal coil 22, that is, the third intermediate tap connection line 44, and are wound around. Third magnetic ring 40.

In essence, the second toroidal coil 32 and the third toroidal coil 42 are respectively considered as input impedance Rin and input impedance Rout as shown in the simple equivalent circuit of the sixth diagram. Since the second toroidal coil 32 and the third toroidal coil 42 are specifically designed such that the input impedance Rin and the input impedance Rout are matched to each other, for example, 50 Ω, the conduction current I flowing through the inventive pulse filter can be greatly reduced and approached. Zero current, the purpose of reducing power consumption, thereby increasing the effective transmission distance.

Since the second intermediate tap connection line 34 is connected from the TCT1 pin, the TCT2 pin, the TCT3 pin, the TCT4 pin to the center tap of the left side of the first loop coil 22 and surrounds the second magnetic ring 30, Moreover, the third intermediate tap connection line 44 is connected from the MCT1 pin, the MCT2 pin, the MCT3 pin, the MCT4 pin to the middle tap of the right side of the first toroidal coil 22 and surrounds the third magnetic ring 40, Therefore, the second magnetic ring 30 and the third magnetic ring 40 have the function of a choke coil, which can effectively filter high frequency noise and further improve signal transmission quality.

In order to further understand the characteristics of the present creation, reference may be made to the seventh figure, the detailed equivalent circuit of the pulse filter of the first embodiment of the present invention is compared with the third figure, and it is obvious that the creation system has an input group resistance at the same time. And output impedance, but the conventional technology only has input impedance.

Further referring to the seventh and eighth figures, a schematic diagram and a circuit diagram of the pulse filter of the second embodiment of the present invention are provided. It is to be noted that the pulse filter of the second embodiment of the present invention is similar to the first embodiment of the present invention and has the same elements, including the housing 10 and the four sets of the first magnetic ring 20 and the first toroidal coil. 22. The second magnetic ring 30, the second toroidal coil 32, the third magnetic ring 40, and the third toroidal coil 43, and the technical difference therebetween is in the middle of the left side of the first toroidal coil 22 in the second embodiment. The second intermediate tap connection 34, which is tapped to the TCT1 pin, the TCT2 pin, the TCT3 pin, and the TCT4 pin, is designed to bypass without bypassing the second magnetic ring 30, and likewise, by the first ring The third tap link 44 of the right side of the coil 22 connected to the MCT1 pin, the MCT2 pin, the MCT3 pin, the MCT3 pin, and the MCT4 pin is designed to bypass without bypassing the third magnetic ring 40. . Therefore, the pulse filter of the second embodiment does not provide a function of the choke coil for the transmission signal.

In summary, this creation is characterized by the use of three toroidal coils as input impedance, transformer, output impedance, and built-in insulation housing to protect against isolation, not only the input impedance can effectively filter the common mode from the RJ45 connector. Noise, the output impedance can also be used to filter the high-frequency noise generated by the network IC to prevent waveform distortion, and the input impedance and output impedance are specifically designed to be impedance matched, so the transmission loss of the overall line is reduced to a very low level. Effectively achieve signal transmission, waveform repair, signal clutter suppression and voltage isolation, etc., thereby increasing the transmission distance, while isolating the chip from the outside, enhancing the anti-interference ability.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧shell

11‧‧‧ pins

20‧‧‧First magnetic ring

22‧‧‧First toroidal coil

30‧‧‧Second magnetic ring

32‧‧‧second toroidal coil

34‧‧‧Second intermediate tap cable

40‧‧‧ Third magnetic ring

42‧‧‧3rd toroidal coil

44‧‧‧ Third intermediate tap cable

I‧‧‧ conduction current

IC‧‧‧ network integrated circuit

Rin‧‧‧Input impedance

Rout‧‧‧Output impedance

SK‧‧‧ network connector

The first figure shows a schematic diagram of a network filter in a conventional technique. The second figure shows a simple equivalent circuit diagram of a network filter in the conventional technique. The third figure shows the detailed equivalent circuit of the network filter in the conventional technology. The fourth figure shows a schematic diagram of a pulse filter in accordance with the first embodiment of the present invention. The fifth figure shows a circuit diagram of a pulse filter according to the first embodiment of the present invention. The sixth figure shows a simple equivalent circuit diagram of the pulse filter according to the first embodiment of the present invention. The seventh figure shows a detailed equivalent circuit of the pulse filter according to the first embodiment of the present creation. The eighth figure shows a schematic diagram of a pulse filter in accordance with a second embodiment of the present invention. The ninth drawing shows a circuit diagram of a pulse filter according to the second embodiment of the present invention.

Claims (7)

A pulse filter for connecting a network connector to a network integrated circuit to provide a pulse filtering function, comprising: four first magnetic rings; four first toroidal coils, and each of the first rings The shaped coil is wound around the corresponding first magnetic ring to form a transformer; four second magnetic rings; four second toroidal coils, and each of the second toroidal coils is wound around the corresponding second magnetic The loop forms an input impedance; four third magnetic loops; four third loop coils, and each of the third loop coils is wound around the corresponding third magnetic loop to form an output impedance; four second intermediate taps a connecting line; a fourth third intermediate tapping wire; and a housing for receiving the first magnetic ring, the first toroidal coil, the second magnetic ring, the second toroidal coil, The third magnetic ring and the third toroids have a plurality of pins connected to the second toroids and the third toroids, wherein each of the second intermediate taps is a middle tap of one side of the first toroidal coil is connected to the corresponding The pin, each of the third intermediate tap connecting wires is connected to a corresponding one of the pins of the other side of the first loop coil, the corresponding second loop coil, the corresponding The first toroidal coil and the third toroidal coil are sequentially connected, and the network connector is connected to the network integrated circuit via the pins. The pulse filter according to claim 1, wherein the network connector is an RJ45 connector and includes a TCT1 pin, a TD1+ pin, a TD1- pin, a TCT2 pin, and a TD2+ pin, a TD2-pin, a TCT3 pin, a TD3+ pin, a TD3-pin, a TCT4 pin, a TD4+ pin, and a TD4-pin, and the network integrated circuit includes One MCT1 pin, one MX1-pin, one MX1-pin, one MCT2 pin, one MX2-pin, one MX2-pin, one MCT3 pin, one MX3-pin, one MX3-pin An MCT4 pin, an MX4-pin, and an MX4-pin, respectively, the TCT1 pin corresponding to the network connector, the TD1+ pin, the TD1- pin, the TCT2 pin, the TD2+ pin, the TD2-pin, the TCT3 pin, the TD3+ pin, the TD3-pin, the TCT4 pin, the TD4+ pin, and the TD4-pin. The pulse filter according to claim 2, wherein the second intermediate tap connection line is connected to the TCT1 pin of the network connector via the pin, the TCT2 pin, and the TCT3 pin. And one of the TCT4 pins, and the third intermediate tap connection line is connected to the MCT1 pin of the network integrated circuit via the pin, the MCT2 pin, the MCT3 pin, and the MCT4 One of the pins. The pulse filter of claim 1, wherein the second intermediate tap link is connected to the corresponding pin by the first loop coil passing around the second magnetic ring, and the third intermediate The tap wire is connected to the corresponding pin by the third loop coil wound around the third magnetic ring. The pulse filter of claim 1, wherein the second intermediate tap connection line is not wound around the second magnetic ring, but is directly connected to the corresponding one by the first toroidal coil, and the The third intermediate tap connection line is not wound around the third magnetic ring, but is directly connected to the corresponding one by the third toroidal coil. The pulse filter of claim 1, wherein the first magnetic ring, the second magnetic ring, and the third magnetic ring are core magnetic rings. The pulse filter of claim 1, wherein the first toroidal coil, the second toroidal coil, the second intermediate tapped connection line, the third toroidal coil, and the third intermediate tapped connection line are Two-phase stranded enameled wire.